Merge pull request #16 from lyhcode/master

change conf.host.length to length()
server-side authentication
permissions config
default facebook connect button as png
Merge branch 'master' of github.com:splix/grails-spring-security-facebook
extends docs with server-side auth and basic usage
docs - configuration options
prepare 'princial' for spring security (fix #17)
fix mess with different domains, FacebookUser and AppUser
refactoring (usage of FacebookUser/AppUser domain classes)
docs
v 0.10
readme
fix #18
v0.10.2
Fix cast error from GString to String when using MongoDB
fix #19
v0.10.3
docs improvement
Merge pull request #25 from fniwes/03d8f360d0ef4a1e9b7c66baa990f6bc9bc317f0

Fix for MongoDb