Aloowed linksets to be subsets of other linksets
Subset also working if parent is not declared type
Include a warning for all supersets.
Imprved error message
Link Object now never considered a superset
Remove load of files no longer in exisitance
Error if linked file is the wrong type
Now also creates a Resource even with type null
Removed debug statements
Improved support for untypes super voids
Better loading of subsets
Merge branch 'master' into develop

Conflicts:
	org.bridgedb.tools.metadata/src/org/bridgedb/tools/metadata/MetaDataSpecification.java
	org.bridgedb.tools.metadata/test/org/bridgedb/tools/metadata/FileTest.java
better error logging
Improved reading with subsets
Improved error reporting.
Downgrade and exception to a sameas fail
Improved error reporting on test
Can now read from a URI
Able to read from github
More reading from URI test