-fixed add_group() and add_skill(). -added functions to locate delete buttons on skills and groups

Added functions to determine if groups or skills were present.

Added tests for adding/removing skills/groups

Added selectors and methods for groups and skills labels

-fixed add_group() and add_skill(). -added functions to locate delete buttons on skills and groups

Added functions to determine if groups or skills were present.

Added tests for adding/removing skills/gropus

Added selectors and methods for groups and skills labels
Merge pull request #114 from dchunwong/master

[#112] Added tests for adding/deleting groups and skills. Also added extra locators and methods relating to groups and skills