Snuffle continued

Save indices of maxima of frames in addition to smax. Load that trace to retrieve the index of the underlying maxima when running detector from snuffling. Assign corresponding lat and lon to detections' events.
Makes the detection independent from stacking.

See merge request !6

Snuffle

lassie snuffle <config> loads data and a lassie snuffling which allows to re-run the detection on the SMAX trace.

See merge request !4

Comes handy to test lassie performance with synthetic datasets or to against
another existing catalog

overwrite stackmax directory if --force

...otherwise zombie traces of previous runs might remain in that directory. Could happen if traces are prepared in a different way when changing config files.

See merge request !5

core: save stackmax by tmin_ms

The high frequency ASPO data set (used by Jose) requires short time windows, shorter than 1 second. stackmax traces have therefore repeatedly been overwritten. tmin_ms as file name solves this issue in this case. Using tmin_ns made the trace names lengthy and I don't think anyone needs this (until now at least). Hence, it's a compromise.

See merge request !2

ifc: use scipy fftconvolve instead of numpy convolve.

Performance increases significantly for long time windows when using fftconvolve over convolve. I tested two data sets: ASPO and the alentejo example dataset. Checkout the attached terminal output of the alentejo example. 
At the top: the current master branch version. The numbers in between the lines are processing times needed for that specific time window.
At the bottom: the proposed version using fftconvolve. It's a bit faster as you can see.
However, the ifc pre-processing of the ASPO  application of Jose accelerates by a factor of about 35 when using fftconvolve!
The maximum relative (!) differences in trace amplitude when comparing both versions if about 1e-6 . Hence, negligible, I think. Also, detections are identical.
...Just faster.
[lassie_compare.txt](/uploads/3f7e1cf3054ca9e8f355e0df6419244f/lassie_compare.txt)

See merge request !3

Snuffle

lassie snuffle <config-file>  opens snuffler with station meta data, waveforms and detections.

See merge request !1