Simplify overcomplicated navigation drawer item layout
Improve IGF item layout

- separate the "bar" in an extra layout file for reusability (as list
  and grid layout use the same)
- optimize View structure
Fix gridview selector

There was no visible feedback on item selection since switching to
AppCompat. This will fix this and adds a ripple for Android 5+.
Fix popup selector

Same thing like the gridview selector in the previous commit.
Merge pull request #293 from d-sko/layout_fixes

Some layout fixes
Fix messed up episode/volume counter when preceding text is wrapped
Merge pull request #294 from d-sko/counter_fix

Fix messed up episode/volume counter when preceding text is wrapped
Fix possible text overlapping in MAL info card

This replaces the old RelativeLayout by a TableLayout to prevent text
overlapping. It's now wrapped if it is to long for one line.
Merge pull request #295 from d-sko/mal_info_card_fix

Fix possible text overlapping in MAL info card
Move to Beta API

Change the endpoint to the new API beta address.
Beta Product Flavor

Set up product flavors to allow building the beta product easily.