Updated README.

README.md

 # ESAP
-ESAP repository for the ESCAPE project
+
+
+This is a repository for quickly having an instance of ESAP up & running. Batteries included.
+
+
+## Quickstart
+
+Requirements:
+    
+    Bash and Docker.
+
+
+Setup
+
+    $ esap/setup
+
+
+Build
+
+    $ esap/build
+
+
+Run
+
+    $ esap/run
+
+
+Play
+
+    https://localhost
+
+
+Clean
+
+    $ esap/clean
+
+
+### Extras
+
+List all running services
+
+    # esap/ps
+
+Open a shell in a service
+
+    # esap/shell api-gateway
+
+
+
+### Building errors
+
+It is common for the build process to fail with a "404 not found" error on an apt-get instrucions, as apt repositories often change their IP addresses. In such case, try:
+
+    $ esap/build nocache
+
+