Stable v0.4.1

Little changes in app's theme.
New "Time ago" algorithm.
In "Match Schedule" now it is possible to choose only the opponent
(thus, the user must take part to the match).
Added "Head to head" section in MatchSummary.
"Previuos matches" UI reviewed.
"Next match" and "Last match" sections in MainFragment UI changed.
Added MatchesListFragment instead of MatchesListPager.
Cursor management reviewed.
The ranking view now shows "N.A." (not available) instead of "0" when a
player haven't played any match in the selected year.
PlayersList now correctly save the list type (list, grid, rank).
Added "View ranking" item in "Players List" menu.
Deleted "Ranking" item from drawer.
Deleted "Schedule" item from drawer.
Restyled clubs and players lists.
Restyled skills box in MainFragment.
Added "Last match" in MainFragment.
Fixed scrollbars and clip to padding in PlayersGrid.
Created a new spinner specifically for the players ranking list.
Fixed UI to meet the app "brand", using "Android Asset Studio" zip.
Restyled MatchSummaryActivity UI.
Bug fixed.
User info in the Navigation Drawer

Restyled Navigation Drawer, now contains user info and settings menu
item.
Removed settings item from every 3-dots menu.
Bug fixed.
AndroidManifest: update to version 0.5