Iftach Sadeh / ctools

… cases, restructured csiactobs to avoid code duplication and added csobsdef::obs() function to retrieve observation container

The new GApplication logger support function take the chattiness level as the first argument.

# Conflicts:
#	cscripts/csiactcopy.py
#	cscripts/csiactdata.py

…oid code duplication in cscripts.