Merges pull request \#150 from bazzoli/bazzoli-master-plus-JKlab-only-fixes-test3.
Adds new code from the Karanicolas lab to:
- extract constellations of spatially contiguous atoms.
- dock small-molecules via ray-casting (DARC)
- create pocket "exemplars" to assess protein druggability.
Breaks the following integration tests because they serve new/updated code from the JK-lab.
- constel
- darc
- DARC_with_conformer_sampling_and_elctrostatics
- make_exemplar
Broke the following integration tests too, but these were already broken:
- antibody_graft
- features
- filter_termini_near_interface
- hts_io
- inverse_rotamer_remodel
- loop_creation
- rosetta_scripts_hbond_options
- splice_out_shorter_tail
- splice_out_tail