Added base Web App functionalities and models. Minor fixes.

images/webapp/code/rosetta/base_app/static/favicon/site.webmanifest

+{
+    "name": "",
+    "short_name": "",
+    "icons": [
+        {
+            "src": "/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/android-chrome-256x256.png",
+            "sizes": "256x256",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff",
+    "display": "standalone"
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/bordered-pulled.less

+// Bordered & Pulled
+// -------------------------
+
+.@{fa-css-prefix}-border {
+  padding: .2em .25em .15em;
+  border: solid .08em @fa-border-color;
+  border-radius: .1em;
+}
+
+.pull-right { float: right; }
+.pull-left { float: left; }
+
+.@{fa-css-prefix} {
+  &.pull-left { margin-right: .3em; }
+  &.pull-right { margin-left: .3em; }
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/core.less

+// Base Class Definition
+// -------------------------
+
+.@{fa-css-prefix} {
+  display: inline-block;
+  font: normal normal normal 14px/1 FontAwesome; // shortening font declaration
+  font-size: inherit; // can't have font-size inherit on line above, so need to override
+  text-rendering: auto; // optimizelegibility throws things off #1094
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/fixed-width.less

+// Fixed Width Icons
+// -------------------------
+.@{fa-css-prefix}-fw {
+  width: (18em / 14);
+  text-align: center;
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/font-awesome.less

+/*!
+ *  Font Awesome 4.2.0 by @davegandy - http://fontawesome.io - @fontawesome
+ *  License - http://fontawesome.io/license (Font: SIL OFL 1.1, CSS: MIT License)
+ */
+
+@import "variables.less";
+@import "mixins.less";
+@import "path.less";
+@import "core.less";
+@import "larger.less";
+@import "fixed-width.less";
+@import "list.less";
+@import "bordered-pulled.less";
+@import "spinning.less";
+@import "rotated-flipped.less";
+@import "stacked.less";
+@import "icons.less";

images/webapp/code/rosetta/base_app/static/font-awesome/less/larger.less

+// Icon Sizes
+// -------------------------
+
+/* makes the font 33% larger relative to the icon container */
+.@{fa-css-prefix}-lg {
+  font-size: (4em / 3);
+  line-height: (3em / 4);
+  vertical-align: -15%;
+}
+.@{fa-css-prefix}-2x { font-size: 2em; }
+.@{fa-css-prefix}-3x { font-size: 3em; }
+.@{fa-css-prefix}-4x { font-size: 4em; }
+.@{fa-css-prefix}-5x { font-size: 5em; }

images/webapp/code/rosetta/base_app/static/font-awesome/less/list.less

+// List Icons
+// -------------------------
+
+.@{fa-css-prefix}-ul {
+  padding-left: 0;
+  margin-left: @fa-li-width;
+  list-style-type: none;
+  > li { position: relative; }
+}
+.@{fa-css-prefix}-li {
+  position: absolute;
+  left: -@fa-li-width;
+  width: @fa-li-width;
+  top: (2em / 14);
+  text-align: center;
+  &.@{fa-css-prefix}-lg {
+    left: (-@fa-li-width + (4em / 14));
+  }
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/mixins.less

+// Mixins
+// --------------------------
+
+.fa-icon() {
+  display: inline-block;
+  font: normal normal normal 14px/1 FontAwesome; // shortening font declaration
+  font-size: inherit; // can't have font-size inherit on line above, so need to override
+  text-rendering: auto; // optimizelegibility throws things off #1094
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+.fa-icon-rotate(@degrees, @rotation) {
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=@rotation);
+  -webkit-transform: rotate(@degrees);
+      -ms-transform: rotate(@degrees);
+          transform: rotate(@degrees);
+}
+
+.fa-icon-flip(@horiz, @vert, @rotation) {
+  filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=@rotation, mirror=1);
+  -webkit-transform: scale(@horiz, @vert);
+      -ms-transform: scale(@horiz, @vert);
+          transform: scale(@horiz, @vert);
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/path.less

+/* FONT PATH
+ * -------------------------- */
+
+@font-face {
+  font-family: 'FontAwesome';
+  src: url('@{fa-font-path}/fontawesome-webfont.eot?v=@{fa-version}');
+  src: url('@{fa-font-path}/fontawesome-webfont.eot?#iefix&v=@{fa-version}') format('embedded-opentype'),
+    url('@{fa-font-path}/fontawesome-webfont.woff?v=@{fa-version}') format('woff'),
+    url('@{fa-font-path}/fontawesome-webfont.ttf?v=@{fa-version}') format('truetype'),
+    url('@{fa-font-path}/fontawesome-webfont.svg?v=@{fa-version}#fontawesomeregular') format('svg');
+//  src: url('@{fa-font-path}/FontAwesome.otf') format('opentype'); // used when developing fonts
+  font-weight: normal;
+  font-style: normal;
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/rotated-flipped.less

+// Rotated & Flipped Icons
+// -------------------------
+
+.@{fa-css-prefix}-rotate-90  { .fa-icon-rotate(90deg, 1);  }
+.@{fa-css-prefix}-rotate-180 { .fa-icon-rotate(180deg, 2); }
+.@{fa-css-prefix}-rotate-270 { .fa-icon-rotate(270deg, 3); }
+
+.@{fa-css-prefix}-flip-horizontal { .fa-icon-flip(-1, 1, 0); }
+.@{fa-css-prefix}-flip-vertical   { .fa-icon-flip(1, -1, 2); }
+
+// Hook for IE8-9
+// -------------------------
+
+:root .@{fa-css-prefix}-rotate-90,
+:root .@{fa-css-prefix}-rotate-180,
+:root .@{fa-css-prefix}-rotate-270,
+:root .@{fa-css-prefix}-flip-horizontal,
+:root .@{fa-css-prefix}-flip-vertical {
+  filter: none;
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/spinning.less

+// Spinning Icons
+// --------------------------
+
+.@{fa-css-prefix}-spin {
+  -webkit-animation: fa-spin 2s infinite linear;
+          animation: fa-spin 2s infinite linear;
+}
+
+@-webkit-keyframes fa-spin {
+  0% {
+    -webkit-transform: rotate(0deg);
+            transform: rotate(0deg);
+  }
+  100% {
+    -webkit-transform: rotate(359deg);
+            transform: rotate(359deg);
+  }
+}
+
+@keyframes fa-spin {
+  0% {
+    -webkit-transform: rotate(0deg);
+            transform: rotate(0deg);
+  }
+  100% {
+    -webkit-transform: rotate(359deg);
+            transform: rotate(359deg);
+  }
+}

images/webapp/code/rosetta/base_app/static/font-awesome/less/stacked.less

+// Stacked Icons
+// -------------------------
+
+.@{fa-css-prefix}-stack {
+  position: relative;
+  display: inline-block;
+  width: 2em;
+  height: 2em;
+  line-height: 2em;
+  vertical-align: middle;
+}
+.@{fa-css-prefix}-stack-1x, .@{fa-css-prefix}-stack-2x {
+  position: absolute;
+  left: 0;
+  width: 100%;
+  text-align: center;
+}
+.@{fa-css-prefix}-stack-1x { line-height: inherit; }
+.@{fa-css-prefix}-stack-2x { font-size: 2em; }
+.@{fa-css-prefix}-inverse { color: @fa-inverse; }