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
[Issue #197] added the gem for pie charts
[Issue #187][WIP] done with backend and documentation
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into C4_nourhanZ_C4S04_VisualStats
[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
[Issue #74][Fixed] Fixed a bug concerning arabic keywords' search
[Issue #187][WIP] modified method retrieve synonyms
[Issue #189] Added documentation to the mailer methods
Merge branch 'master' of https://github.com/MGhanem/smartsoft-13 into C4_nourhanZ_C4S04_VisualStats
[Issue #195][WIP] added method retrieve_synonyms in keyword.rb model
The first working visual statistics, manythings will be changed but this is working till now
[Issue #195][MC] resolved a merge conflict after pulling master branch
[Issue #189] Added test framework
Merge branch 'master' into C4_m0hamed_C5F1_send_mail
[Issue #189] Added tests
Added Guardfile and rspec to .gitignore
[Issue #195][WIP] updated yml translation files
[Issue #195][WIP] updated yml translation files