Adding Skype group to readme.md
Implemeneted 'Attribution' & 'Media Source' fields for content item
Facilitate API/UI integration by providing API stub
Fixed bug when content item's attribution was not displayed.
Made attribution and mediaSource fields lowercase on client
Merge pull request #197 from yl790/master

bug fixes + unit test
Merge pull request #200 from javierluraschi/ReadmeSkype

Added link to Skype group in readme.md
Merge pull request #203 from javierluraschi/ProfileAPIIntegration

Facilitate API/UI integration by providing API stub
Merge pull request #239 from alex-zen/exhibitAuth

Implemeneted 'Attribution' & 'Media Source' fields for content item