Merge pull request #40 from habuma/master

SOCIALLI-23: Polish and formatting
Merge pull request #41 from habuma/master

Upgrade Spring Social LinkedIn to use OAuth 2.
Merge pull request #42 from habuma/master

Fix for SOCIALLI-28: Authorization interceptor was wrongly removing JSON format interceptor.
Merge pull request #43 from habuma/master

Remove Authorization header from LinkedIn API requests.
Merge pull request #45 from habuma/master

Update to Jackson 2
Merge remote-tracking branch 'upstream/master'