Added base Web App functionalities and models. Minor fixes.

.../mimetypes/gnome-mime-application-vnd.sun.xml.impress.png

...s/mimetypes/gnome-mime-application-vnd.sun.xml.writer.png

...ic/icons/mimetypes/gnome-mime-application-wordperfect.png

...cons/mimetypes/gnome-mime-application-x-7z-compressed.png

...atic/icons/mimetypes/gnome-mime-application-x-abiword.png

...mimetypes/gnome-mime-application-x-applix-spreadsheet.png

.../icons/mimetypes/gnome-mime-application-x-applix-word.png

...atic/icons/mimetypes/gnome-mime-application-x-archive.png

...p/static/icons/mimetypes/gnome-mime-application-x-arj.png

...imetypes/gnome-mime-application-x-bzip-compressed-tar.png

.../static/icons/mimetypes/gnome-mime-application-x-bzip.png

...tic/icons/mimetypes/gnome-mime-application-x-compress.png

...ons/mimetypes/gnome-mime-application-x-compressed-tar.png

...ns/mimetypes/gnome-mime-application-x-cpio-compressed.png

.../static/icons/mimetypes/gnome-mime-application-x-cpio.png

...p/static/icons/mimetypes/gnome-mime-application-x-deb.png

...p/static/icons/mimetypes/gnome-mime-application-x-dvi.png

...c/icons/mimetypes/gnome-mime-application-x-executable.png

...tic/icons/mimetypes/gnome-mime-application-x-font-afm.png

...tic/icons/mimetypes/gnome-mime-application-x-font-bdf.png