remove jQuery use from the gravatar directive
remove jQuery, it is useless now
Merge pull request #9 from TopCS/jquery

Remove jQuery depends
bower config
Merge pull request #11 from garethdjames/bower

bower config
refactored the image src generation into a service
Merge pull request #12 from garethdjames/refactorImageSrc

refactored the image src generation into a service
Addressed Issues #8 and #10. Cleaned up default attribute processing to remove unnecessary code.
Addressed Issues #8 and #10. Cleaned up default attribute processing to remove unnecessary code.