Konstancja Satalecka / ctools

…gning the old best optimizer result).

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

…erLM logger constructor interface (now takes a pointer instead of a reference).

The processing for empty event files is skipped. The file is simply written out empty again.

Conflicts:
	ChangeLog
	NEWS
	src/ctbkgcube/ctbkgcube.cpp
	test/test_ctools.sh