Documentation update: exchanteToken() method and tokenRetrievalRetryCount config param and migration from benorama user to agorapulse organization.
Grails version + wrapper upgraded to 2.2.2
tokenRetrievalRetryCount config parameter added to Facebook context user (for failed authorization code exchange), disabled by default
Version bumped to 0.4.11
Minor doc typo fix
Merge branch 'release/0.4.11'

Conflicts:
	application.properties