Add event management button to recalculate players statistics

It would be a good thing to add an button to recalculate players statistics 
from scratch.
Now, after a match is reported or deleted, the statistics of the players who 
played that match are updated with the delta from the match.
(trueskill, games played, losses, wins, draws, score, points, streaks, 
awards)
The players ratings are calculated when the results table is viewed. 

If something goes wrong, the players data may get corrupted.
So we can add a function to 
- reset players data
- for each match played, update the players data.

Original issue reported on code.google.com by frederic...@gmail.com on 22 Nov 2009 at 9:17

qam4 / ebattles

Add event management button to recalculate players statistics #54