Add some test to game entity
Complete game test #24
Merge pull request #50 from martinqt/refactor

Refactor (first part)
Fix game entry edition
Remove edition and creation from history
Fix game edition
Fix tests
Add session rollback
Fix game detail form during creation
Protect game entry against duplicated entries
Rename game form
Change score graph
Fix query
Merge branch 'dev' into refactor
Fix game form
Refactor game manager