- Added static get(...) methods to Role
- Added getRole(String) method to ServerResource.
- Refactored GaeEnroler constructors to require proper Role instances or parent Application.
- Refactored OAuth and MemoryRealm to use the new role related methods.
Merge branch 'master' of github.com:restlet/restlet-framework-java

Conflicts:
	build/tmpl/text/changes.txt
	modules/org.restlet/src/org/restlet/security/MemoryRealm.java