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
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
DOC: minor chnages for PEP8
C: modifed nsls2/cor.py changed detector_center to calibrated_center
ENH: modified nsls2/cor.py and nsls2/recip.py
ENH: Merge branch 'Reciprocal_Space' of github.com:sameera2004/NSLS2 into Reciprocal_Space

* 'Reciprocal_Space' of github.com:sameera2004/NSLS2:
  C: modifed nsls2/cor.py changed detector_center to calibrated_center
  DOC: minor chnages for PEP8
  DOC: minor chnages for PEP8
  MNT: modified nsls2/recip.py for keys_core
  ENH: key_core adding to nsls2/recip.py
  BUG: fixed a bug in the recip.py adfter changing keys_core
  DOC: Minor corrections for PEP8 and spelling errors

Conflicts:
	nsls2/recip.py