MNT: modifed nsls2/tests/test_recip.py

Changed variable names in test_recip.py
ENH: modifed nsls2/core.py

 - set units of detector_angle to be degrees
 - changed name of UBmat -> ub_mat
DOC: Minor corrections for PEP8 and spelling errors

Conflicts:
	nsls2/core.py
	nsls2/recip.py

DOC: Minor corrections for PEP8 and spelling errors

DOC: Minor corrections for PEP8 and spelling errors
modified nsls2/core.py nsls2/recip.py
Conflicts:
	nsls2/core.py
	nsls2/recip.py

DOC:to merege this Minor corrections for PEP8 and spelling errors

Conflicts:
	nsls2/core.py
	nsls2/recip.py

BUG: fixed a bug in the recip.py adfter changing keys_core

BUG: fixed a bug in the recip.py adfter changing keys_core

ENH: key_core adding to nsls2/recip.py

MNT:   modified nsls2/recip.py for keys_core

Conflicts:
	nsls2/recip.py

DOC: minor chnages for PEP8

Conflicts:
	nsls2/recip.py

MNT: modified nsls2/recip.py for keys_core
C: modifed nsls2/cor.py changed detector_center to calibrated_center
MNT : down-graded logging levels

 - I don't think than any of the loggers should be above debug
 - PEP8 cleanup
MNT : removed un-used function

get_grid_mesh is not used anywhere in the code-base