Initial version of the mailer

can send generic message using string for body, subject and recipient
[Issue #187][WIP] resolved some indentation in model synonym for readability
modified age to date of birth and country to be drop down #91
[Issue #187][WIP] done with backend and documentation
implementation has been remodified[issue #89]
[Issue #187][WIP] solved a bug in the backend method retrieve_synonyms
[Issue #187][WIP] sorted the retrieved list of synonyms acc. to the highest vote count
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into c1_zoheiry_c1s10_edit
[Issue #187][WIP] modified method retrieve synonyms
[Issue #189] Added documentation to the mailer methods
Added tabs to the developer backend
fixed formatting errors
fixed routes with scope
removed duplicate devise entry
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into c1_zoheiry_c1s10_edit
Merge branch 'game_module_skeleton' of https://github.com/MGhanem/smartsoft-13 into c1_zoheiry_c1s4_newgame
Merge branch 'game_module_skeleton' of https://github.com/MGhanem/smartsoft-13 into c1_zoheiry_c1s4_newgame
[Issue #189] Added test framework
Merge branch 'master' into C4_m0hamed_C5F1_send_mail
[Issue #189] Added tests