Mathieu Servillat / ctools

# Conflicts:
#	cscripts/cslightcrv.py

…etting up the unit tests.

# Conflicts:
#	cscripts/cta_make_nodes.py

…or 1 (STDOUT) to /dev/null.

…lementing missing information from user parameters.

Note that test_python_ctools.py could ultimately replace all ctools, as for the shell script we anyways to not recover the results. Still, the shell script may still make some limited sense.

Enhance ctbin Python module unit test to see that read_ahead() gets enabled. Success, so the Python module unit test impacts the c++ coverage, great!