EDIT

Merged latest trunk updates to branch

introducing enum for Roles

securing GroupService and GrantedAuthorityService, simple tests for UserService security

replacing lucene-grouping classes by mvn dependency

fixing #2950 (Allow grouping of lucene (hibernate search) results) - max score included

some more cleaning up

removing deprecated methods

almost 100% fixing #2950 (Allow grouping of lucene (hibernate search) results) - only max score is not yet available

first implementation: existing tests all Ok, grouping does not yet really work, index changes needed

adding lucene grouping module from http://svn.apache.org/repos/asf/lucene/dev/tags/lucene_solr_3_2/lucene/contrib/grouping/