[Issue #193] Fixed documentation
[Issue #193] Fixed uml
[#181][WIP] checked code convetions
[#181][WIP] added missing end in my_subscription causing errors
[#181][WIP] removed unused twitter method
[#181][WIP] updated code conventions
[#199][WIP] corrected place of return statement
[Issue #193] Fixed code convention
Merge branch 'C4_m0hamed_C5F2_switch_locales' of github.com:MGhanem/smartsoft-13 into C4_m0hamed_C5F2_switch_locales
Yamli API, changing background color in game, added translation developer side
added translations for the game over
Added Yamli to both text boxes in the voting page, changed game background
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into C2_Mirna-Yacout_C2S2_connectToTwitter

Conflicts:
	arability/app/models/my_subscription.rb
[isue #172][issue #175] created ajax follow/unfollow dynamic button
[#181][WIP] removed devise omniauth callbacks
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into C2_Mirna-Yacout_C2S2_connectToTwitter
[#181][WIP] added email to create_with_omniauth
[#181][MC]
[Issue #80] finished implementation and documentation of username or email signin
[#181][WIP] updated documentation spacing