Merge pull request #2 from gregorybesson/develop

FB pages administration
some bugs fixed + open a FB page on appId select in appId edition
PLAYGROUND-60 : unit tests
PLAYGROUND-60 : update gitignore
PLAYGROUND-252 : persist FB app name
PLAYGROUND-252 : add app name to app dropdown in game edit form
PLAYGROUND-60 : FB apps can be linked to FB pages
Merge pull request #4 from bruweb/bthomas-facebook-pages-and-apps-60

[WIP] PLAYGROUND-60 : unit test + page selection from app list / PLAYGROUND-252 : app name in game edit form