some improvements
phase cache gets prefilled with picked data
fixed bug in stations2targets
no need to hand over refsource to check_plot anymore
adjusted tests
some more flexibility depending on platform
cleanup/sync
Merge branch 'statistics' of github.com:HerrMuellerluedenscheid/derec into statistics

Conflicts:
	stats/doctar_results/waveforms/robust.py
	stats/doctar_results/waveforms/z2000_cand.mseed
	stats/plot_robust.py