Packaging of views + layout for keyword selection

- Subpackage in views for keyword selection
- Dynamic menu
- Logo displayed
- Redirection of the views at the good place

NB: I changed the names in the Cache, we now have:
- "keywords": list of keywords from the translation
- "coordinates": list of coordinates from the area selection
- "isStarted": set if the research is started
Merge branch 'master' of https://github.com/TweetAggregator/TweetAggregator

Conflicts:
	app/controllers/Application.scala
	conf/routes