more StringBuilder/Buffer reduction; URI constants as possible; reduced object creation in AttributeFinders

Merged Conflicts:
	fcrepo-server/src/main/java/org/fcrepo/server/resourceIndex/UvaStdImgTripleGenerator_1.java
	fcrepo-server/src/main/java/org/fcrepo/server/security/AttributeFinderModule.java
	fcrepo-server/src/main/java/org/fcrepo/server/storage/RDFRelationshipReader.java
	fcrepo-server/src/main/java/org/fcrepo/server/storage/translation/handlers/FOXMLContentHandler.java
	fcrepo-server/src/main/java/org/fcrepo/server/storage/types/RelationshipTuple.java
	fcrepo-server/src/main/java/org/fcrepo/server/utilities/ServerUtilitySerializer.java
	fcrepo-server/src/main/java/org/fcrepo/server/validation/DOValidatorSchematronResult.java
Update pom.xml to:
- Remove aduna repository
- Bump mulgara-core version
fix many compile warnings about unclosed closeables
do not test the index stmt that was removed
Merge pull request #18 from fcrepo/remove-aduna

Update pom.xml to use hosted mulgara without aduna dependencies
Merge remote-tracking branch 'origin/master' into cp-1055
revert to 1.6 target
fix NPE in web client