parametrage

-the app starts on the update screen (according to value of FIRST_LAUNCH
in localstorage)
-routing avec update does not work
-language change seem erratic
-the app handles showing a loading screen while data is downloaded (http
interceptor), and handle displaying an error message in a modal window
when the data cannot be retrieved
-most logic to change language, feed angular-translate, and store in
localstorage is there

TODO:
-redirection to home screen must work
-data "resolve" for all routes to plug on datastorage
-display rss data on home screen
-clicking on rss entry navigates to "detail" page