[Issue #94] added a new function that finds keyword by name
[Issue #94] changed behavior of the create keyword function
[Issue #94] moved helper method to /lib
[Issue #94] Added test framework

Conflicts:
	arability/Gemfile
[Issue #94] Added tests and corrected behavior
Merge branch 'rolling_master' of github.com:MGhanem/smartsoft-13 into C4_m0hamed_S14_AddWordToDatabase

Conflicts:
	arability/Gemfile
	arability/app/models/keyword.rb