Michael Mayer / ctools

So far, all pipeline example scripts are included in the unit test. Results are not yet checked, but it is assured that all scripts execute without any error.

Convert the cta_root2caldb.py script into a cscript and add unit test. The script only works if PyROOT is installed.

Instead of the cta_root2caldb.py script a generate_prod3_irf.py script was added to the example folder.