more testing on remove chain file
deleteExperiment now deletes experiment directories on disk.
Merge branch 'database' of https://github.com/genomizer/genomizer-server.git into database
Refactored some tests and added/changed a few comments.
GenomeReleases now deleted for real
Merge branch 'database' of https://github.com/genomizer/genomizer-server.git into database
Chain files deleted from file system
Merge remote-tracking branch 'origin/database' into development
Merge remote-tracking branch 'origin/development' into communication

Conflicts:
	src/database/FilePathGenerator.java
	src/testSuite/unitTests/TestFilePathGEN.java
Merge branch 'communication' of https://github.com/genomizer/genomizer-server.git into communication