slight refactor of reflectivity
horrible ormsby hack in one_spike
changed matplotlib backend, added color option
fixed typo in one_spike run_script
defined dt, because it wasn't
fixed some bugs with array sizes
change ylim in stochastic avo to -1,1
may have messed up Zoeppritz in reflection.py
Merge branch 'develop' of https://github.com/agile-geoscience/modelr into develop

Conflicts:
	modelr/web/scripts/one_spike.py