Iftach Sadeh / ctools

The cstsdist parameter interface is now much simpler, requiring on input either an unbinned, binned or stacked observation. If an observation definition XML file is provided it is assumed that the file only contains event lists.

…TE-END, TIME-OBS and TIME-END

# Conflicts:
#	doc/source/users/tutorials/beyond/index.rst

Added conditional passing of pointer to logger in ctpsfcube to ensure ctpsfcube does not print out additional text when 'chatter=0'.

…cripts now from csobservation instead of cslikelihood since they do not use proper optimizers.

# Conflicts:
#	ChangeLog