* Simplified numpy imports
* Isolated Bio.PDB DSSP tests
* Isolated *Exposure tests
* Isolated ResidueDepth and MSMS tests
* Replaced function + global var by setUpClass
* Removed writer tests (PDBIO/MMCIFIO)
* Removed more writer tests (PDBIO)
* Isolated tests for PDBIO
* Isolated tests for MMCIFIO
* Removed unused function
* Missed one test before
* Isolated tests for PPBuilder and CaPPBuilder
* More cleanup...
* Use raise instead of self.skipTest
* Isolated PDBParser tests
* Isolated SMCRA tests
* Moved header tests to the appropriate file
* Silenced warnings in a couple of tests with QUIET=1
* Commented out time-consuming test
* Trigger