fixing doc
Improving the general layout of the app

plus some refactoring to avoid code duplication (Weekend/Current status fragments)
Ability to display messages like "updated 5 minutes ago", or "yesterday" or "at 10:30"
Merge branch 'dev'

Conflicts:
	src/com/tfltravelalerts/statusviewer/LineStatusViewerListFragment.java
	src/com/tfltravelalerts/weekend/WeekendStatusViewerListFragment.java