[Issue #195][SD] added UML sequence diagram for synonym retrieval C4.S02
[Issue #195][SD] added UML sequence diagram for C4.S12 and updated that of C4.S02
[Issue #195][Updating] resolved a typo in keyword.rb retrieve_synonyms method
Merge branch 'word_management_theme' of https://github.com/MGhanem/smartsoft-13 into C4_NourhanMohamed_S12_advanced_search
[Issue #195][Updating] added self. in keyword.rb and added a test case in the search controller test
Merge branch 'word_management_theme' of http://github.com/MGhanem/smartsoft-13 into C4_mostafahassaan_C4S10_ListFollowedWords
[issue #177] fixing indentation