First tests using trueskills
Merging ratings now works correctly
Rating is now shown in the players tab
Merge branch 'master' into calculating-ratings

* master:
  Refreshing only modified files

Conflicts:
	server/package.json
Ratings are in a separate file now and rating calculation
are separated from stats calculation.
Fixed indenting
Now adding a game updates the rating immediately
extracted method calculateStats
extracted method retrieveStats and fixed callback error
When calculating stats and rating games and players are loaded only once.
fixed commas, naming, map loop...
Default Rating shown for new players. Rating Columns merged in UI.
Replaced +- character with shorthand
Renamed playerRatings to playersRatings for consistency
Merge pull request #5 from kuligowski/calculating-ratings

Calculating ratings