Enable some history to the user dashboard

Do have an idea how to recreate the history? 
maybe in the same way you did the recalculation?
that way we could pull this out into a separate task.

because at the moment this is an expensive operation, 
since I write a history entry for each match per user! :)
So 3 matchs with 4 players will obviously generate 12 entries. 

it works on my machine (:wink:) but I've no idea how this performs on heroku, 
since the app performance is already really bad :trollface:  
that's something we should tackle next. 

![pic 2014-03-16 um 10 07 15](https://f.cloud.github.com/assets/685742/2430570/d67f3124-acef-11e3-9cbe-bb1834e297dd.png)

![pic 2014-03-16 um 10 46 40](https://f.cloud.github.com/assets/685742/2430571/eaed6ca2-acef-11e3-8abb-5523d145fcd3.png)