Move more code into MainScreenFragment
Add refreshLayout code into MainScreenFragment
Refactor code for FragmentHelper so that we don't need an activity
Move more code around
Welcome to fragment hell
Make ActivityPrincipal the middle manager in the fragment mayhem
it works, btw
Move listener to code from xml
Fix null passaggio source
Fix the layout
More debugging
Add actions to buttons
Add extra menu items files
Fix about activity Home action and use the toolbar for fun
Remove check since the app runs on Android 4+
