Recent updates: mostly adding additional plot functions

The following changes are associated with this pull request:

eitwaveplot.py:
  - added some new plotting functions to visualise detected wavefront properties.

eitwaveutils.py:
  - edited map_reravel so that it works
  - corrected bug in map_unravel where the lat and lon bin sizes were not correctly grabbed from 'params'

data_hough_detect.py:
  - added lines to include the reraveled model wave and the transform parameters as outputs.