Update user-service.md

Missing annotation.
Use large version of Facebook profile picture

Previous one is too small and not usable
[Issue 465] Continue with Authentication if AvatarService is None.
Added entry for Carpool-Kids app
Fixed: CacheService.Default was ignoring ttl
Upgraded to Play 2.3.5 and fixed most compiler warnings
Fix ClassCastException: scala.runtime.BoxedUnit cannot be cast to securesocial.core.authenticator.Authenticator in @securesocial.core.java.Secured$1$2.apply(Secured.java:87)
Merge pull request #493 from amertum/fix-ClassCastException-secured-annotation-BoxedUnit-Authenticator

Fix ClassCastException: BoxedUnit cannot be cast to Authenticator in @Secured
Merge branch 'refactor-for-m2'
Merge pull request #485 from jondlew/master

Added entry for Carpool-Kids app
Merge branch 'master' of github.com:jaliss/securesocial
- Added crossbuild and upgraded to Play 2.3.7
- Fixed #494: source and target versions are 1.6 now.
Sample code is 1.6 compatible now.
Fixed #468: Redirect loop when canceling Facebook Login Dialog
Merge pull request #461 from nguyentruongtho/master

Use large version of Facebook profile picture
Updated changelog for #461
Pull request #495: disable generateRefReverseRouter (thanks @amertum)
Merge pull request #441 from salaj1986/patch-1

Update user-service.md
updated change log for #441
Fixed #501: Requests get redirected to wrong routes (Java)