Konstancja Satalecka / ctools

Without the energy margin, roundoff errors may lead to the exclusion of the energy bin in case that a single energy bin is used.

…d in observation ebounds. Also added some improvements to csspec.

…no selection was performed)

Conflicts:
	scripts/csresmap.py

…lso modified consistently, csresmap can now also take two maps (cnt and model) as input and compute the residuals directly. The algorithm parameter has been made unhidden

…gning the old best optimizer result).

… csspec and complemented the copy constructor of cterror (the optimiser was not copied and intialised)