Exception if traces have no overlapping data sections.
fixed bug in misfit by snapping traces.
The missing snap call lead to MisalignedTraces if self.tmin>cand.tmin or
self.tmax<cand.tmax and the sampling rate differed.
Merge pull request #21 from HerrMuellerluedenscheid/master

misfit bug
snuffler: reset sigint handler after snuffle()
iris_ws: updated urls
added fdsn stuff
wip on fdsn stuff
continued work on seismosizer
added waveform selection classes
Merge branch 'seismosizer' of github.com:emolch/pyrocko into seismosizer

Conflicts:
	pyrocko/fdsn/station.py
	pyrocko/fdsn/ws.py