Made Serializable

Make this class Serializable, so it can be stored in the HTTP Session
Add mavenLocal() repository as fallback when building offline.
Test against latest Spring release and snapshot
Upgrade to Gradle 1.11
Adjust dependency versions
Updates to reference docs.
Updates to reference docs.
Fix merge conflict
Remove docbook reference source
Update reference docs
Fix package groupings and missing package-info.
Reference Facebook submission process for OpenGraph actions in JavaDoc.
Updated reference doc for API binding changes.
Removed duplicate springVersion setting from build; Build against Spring Social 1.1.0.RC1.
Add age_range to FacebookProfile. SOCIALFB-149
Add 'cover' to fields when fetching page likes. SOCIALFB-141
Add before and after parameters if available when paging. SOCIALFB-139
Build against Spring Social 1.1.0.BUILD-SNAPSHOT
Update dependencies to latest bug fix releases

 - Update Jackson to 2.3.2
 - Update Spring to 4.0.3.RELEASE
 - Update Spring Security to 3.2.3.RELEASE
Merge pull request #110 from wilkinsona/update-dependencies

Update dependencies to latest bug fix releases