Hopefully final fix for meridian plotting.
Fixing STF plot.
Better visibility for different synthetics.
lasif debug now works for event files.
Webinterface now treats an events with 0 stations as valid.
Removing obsolete things.
Completely restructured tutorial.

Broke it up in smaller parts so compilation is faster. Furthermore
most of the tutorial is now adjusted to the small toy example.
Ability to use other backend for the misfit gui if non-osx backend
is chosen.
Adding downloads for the tutorial.