Fixed bug that raised the error : "Error in parameter 'imcmb' for task combine\n'Key imcmb not found'".
It was due to several unnecesary imports of [noao, imred, ccdred] on misc/imtrim.py (which was imported on reduction.set).
It caused that were used ccdred.imcombine instead of mscred.darkcombine, even though the call on calDark.py is iraf.mscred.darkcombine.
Probably is a Pyraf bug.
Merge branch 'master' into limpia

Conflicts:
	doc/diary.txt