Merge pull request #22 from NielsZeilemaker/test-cleanup

Test cleanup
Merge pull request #23 from NielsZeilemaker/test-cleanup

Fix for tracker_checking, removed Core tests
Skip a couple and import cleanup
Merge pull request #24 from NielsZeilemaker/test-cleanup

Fix for test_seeding
Merge pull request #25 from NielsZeilemaker/test-cleanup

After closing all connections to the database, no new ones can be
Merge pull request #26 from NielsZeilemaker/test-cleanup

Fix for config_path2
Merge pull request #27 from NielsZeilemaker/test-cleanup

Should have gone with destdir instead of statedir
Fixed ThreadPool, did not actually close all threads when instructed to
do so.