[#371][WIP] added new view twitter signin
[#371][WIP] changes in views
[#371][WIP] added locales and image
[#371][WIP] added scenario if authentication exists sign in connected user
[#371][MC] resolved conflicts
[#371][WIP] changed rendered view
[#371][NW] updated test for story
[#371][WIP] problem with rendering view
[#371][WIP] finished tests
[#371][WIP] restricted connection of a Twitter account to be used once
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into C2_Mirna-Yacout_C5S25_signinWithTwitter
[#371][WIP] added UML
[#371][WIP] enhanced callback method
[#371][WIP] aligned code view in edit.html
[#371][WIP] generalized process remove connection
[#371][WIP] updated UML
[#371][finished] code conventions
[#371][MC] resolved conflicts
[#371][MC] resolved conflicts
[#371][WIP] pulled master with missing views