Added simple cov
Added gem for code coverage
[#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
Merge branch 'add_to_master' of https://github.com/MGhanem/smartsoft-13 into C4_nourhanZ_C4F1_ListOfUnVotedWords
[Issue #93][WIP] completed the tests to covers 100% of the lines
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into C2_Mirna-Yacout_C2S2_connectToTwitter

Conflicts:
	arability/app/models/my_subscription.rb
[#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
[Issue #93][Finished] change some lines in the code to follow code conventions
[#181][MC]
[#181][WIP] updated documentation spacing
[#181][WIP] updated documentation spacing
[#181][WIP] removed facebook connection view
Added better_errors
[#181][WIP] correced code in twitter callback