Defined PASS and FAIL to be more explicit in tests.
Make testing library shared instead of static.
Define ENABLE_TESTING=YES in cmake to build tests and create target 'test'.
Edited README about testing.
Added set_blurator_links() to make it simple to link agasint the needed libs for libs and execs alike (src and test).
Added test for empty/invalid image input to FaceDetector.
Added test to make sure image conversion Qt -> OpenCV is successful.
Added test source code.
Added test on rect conversions.