added castor_depth.py
added historgrams and improved absolute
Merge branch 'statistics' of github.com:HerrMuellerluedenscheid/derec into statistics
Merge branch 'statistics' of github.com:HerrMuellerluedenscheid/derec into statistics
added uptional reduction by rise time
get_cached_tmin.as_dict return markers, not floats
stack plot works now also for only one depth
see: 7d9ade0b7f56f963ddf0b04e40487420ea67b734
use TestCase.pre_highpass instead of mapping highpass
Merge branch 'statistics' of github.com:HerrMuellerluedenscheid/derec into statistics

Conflicts:
	.gitignore
	stats/plot_robust.py