Marianne Lemoine / ctools

Before, if the output file existed, ctskymap appended an extension to this file.

The publish parameter has been added to the following tools:
- ctbin
- ctbkgcube
- ctcubemask
- ctexpcube
- ctmodel
- ctskymap
- cttsmap

…(see #1360 for details).

…)-function of individual ctools

…d scave() methods to ctool interface. Add read_ahead() method to handle reading of task parameters at the beginning of the task execution. Remove all m_read_ahead members from the derived classes.

The hidden logfile parameter allows specifying the name of the logfile.

The AIT projection is now available in GammaLib.

…nt projections are proposed in parameter file.

GammaLib is undergoing a major interface change which requires adaption of the ctools code.