remove explanation in play.html
Merge pull request #68 from thomaroger/troger-feat-mission-playground-362

remove explanation in play.html
add active / inactive mission + dont show game in mission
refactoring
Merge pull request #69 from thomaroger/troger-feat-active-mission

Activate/Desactivate Missions and don't show game in mission in game list
modified instant-win and game admin base template