Fixes for Issue #289
Merge branch 'trunk' of github.com:impetus-opensource/Kundera into trunk

Conflicts:
	kundera-core/src/main/java/com/impetus/kundera/configure/SchemaConfiguration.java
Refactoring, cleanup for Issue #289.
Merge branch 'trunk' of github.com:impetus-opensource/Kundera into trunk
[PATCH] use org.sonatype.nosql groupId for patched artifact
[PATCH] remove dependency on artifacts from non-central repo
[PATCH] implement Query.getSingleResult
[PATCH] fix Enum handling
[PATCH] fix kundera-cassandra tests under Maven