try to implement filesaved callback
Merge branch 'master' of github.com:TeamCocoDojo/cocodojo

* 'master' of github.com:TeamCocoDojo/cocodojo:
  Fix bugs
temporary remove filesaved reactions
Merge branch 'master' of github.com:TeamCocoDojo/cocodojo

* 'master' of github.com:TeamCocoDojo/cocodojo:
  Register for preview