Gamify

Add some badges : 
- 10, 50, 100, 500, 1000 fixes
- 1, 3, 6 month, 1, 2, 3, .. years 
- archaeologist : fix a bug more than 1 year old
- perfect week : 1 commit each day for 5 day
- rampage : 10 days in a row commits
- busy : More than 20 open bugs
- procrastinator : 2 year old bug pending
- octopus: 10+ fix in one day
- chuck norris: 20+ fix in one day
