merge hbond  donor/acceptor energy lists from energy calculator into one
Merge branch 'hbond-cs' of https://github.com/locsmith/xcamshift.git
into hbond-cs

Conflicts:
	xcamshift/src/cython/Cython_shift_calculator.pyx
	xcamshift/src/test/test_xcamshift_hbond_ingktlkg.py
correct lookup of hbond_id in Hydrogen_bond_base_donor_acceptor_context
remove errant noop line
add a complete hydrogen bond potential class that calculates shifts
remove unused data
add improved test data
update default .gitignore