divided databaseaccessor in subclasses
Merge branch 'database' of https://github.com/genomizer/genomizer-server into database

Conflicts:
	src/database/DatabaseAccessor.java
added test for validating pubmed
worked on tests
ChangeAnnotationLabelTest added
worked on test
Merge branch 'database' of https://github.com/genomizer/genomizer-server into database
Fixed and added more detailed comments before classes and methods
Merge branch 'database' of https://github.com/genomizer/genomizer-server into database
Merge remote-tracking branch 'origin/development' into communication

Conflicts:
	src/testSuite/unitTests/TestFilePathGEN.java