[Issue #94] Fixed documentation
[Issue #94] Added new lines in tests
[Issue #94] Fixed umls
[Issue #94] Fixed uml and code conventions
Merge branch 'word_management_theme' of github.com:MGhanem/smartsoft-13 into C4_m0hamed_S14_AddWordToDatabase

Conflicts:
	arability/app/models/keyword.rb
	arability/spec/models/keyword_spec.rb
Merge remote-tracking branch 'origin/C4_m0hamed_S14_AddWordToDatabase' into C4_m0hamed_S11_search_by_category