add multi exercise to win condition
fix adding multiple exercises
updates competition win condition for highest score
add server tests
add cucumber for creating multi exercise competition
adds activity cucumber test for multi exercise competitions
Merge pull request #22 from CerebralStorm/multiple_exercises

Multiple exercises
update rails
update sass-rails
set exercise controller content only approved exercises
adds load on exercises before filtering them
adds filter to exercises for multi competitions
adds remove button
adds ember facebook
Merge pull request #23 from CerebralStorm/facebook

adds ember facebook
change thread safe version
add Facebook invite buttons
remove old share
changes activités view to calendar
updates activity header