Introducing Thing class in place of Annotation Target and Annotation Body. Adding a specialresource method.
Fixed a bug with parallel TDB access.
Merge branch 'refactor' of github.com:piotrholubowicz/rosrs into refactor

Conflicts:
	src/main/java/pl/psnc/dl/wf4ever/model/AO/Annotation.java
	src/main/java/pl/psnc/dl/wf4ever/model/RO/ResearchObject.java
	src/main/java/pl/psnc/dl/wf4ever/rosrs/ResearchObjectResource.java
	src/main/java/pl/psnc/dl/wf4ever/rosrs/Resource.java
	src/main/java/pl/psnc/dl/wf4ever/sms/SemanticMetadataServiceTdb.java
	src/test/java/pl/psnc/dl/wf4ever/sms/SemanticMetadataServiceImplTest.java
Thing javadoc.
Merge remote-tracking branch 'pejot/refactor' into refactor