Merge pull request #32 from wafels/master

Updated functionality
changes to eit wave plotting routines. Velocity polyfit is now second order and takes the time information from the unravelled maps in order to make the calculations. Added a width_vs_longitude plotting function to show the width of the wavefront along its length at a given time.
added a base map difference module to eitwaveutils.py
added check of imput file exposure time in data_hough_detect.py. Short exposure frames are removed from the analysis. Added additional argument to main, allowing selection of either running difference or base difference methods.
changed base_diff header information in eitwaveutils.py
Merge pull request #33 from aringlis/master

New plotting routine in eitwaveplot, added base map difference module to eitwaveutils, and tweaks to data_hough_detect
fixed bugs in map_reravel function.
added additional plotting routines to display wave parameters.
now include the model of the detected wave as an output, transformed back into heliocentric coordinates. Transform parameters are now also saved as an output.
Merge branch 'master' of git://github.com/sunpy/eitwave
restricted HEK event query to SDO 211A channel
Merge pull request #34 from aringlis/master

Recent updates: mostly adding additional plot functions
added Jacks pb0r function to the repo
some fixes to code: changed to the up-to-date method of creating SunPy maps.
more fixes for code: using new map API and fixes for map unravelling
Updated sim.wave2d to work with latest sunpy.map and sunpy.wcs
Updated visualize because GenericMap.norm is now an attribute
Merge pull request #39 from ayshih/fixes

Fixes sim.wave2d and visualize
Merge remote-tracking branch 'origin/master' into ai
Fixed util to work with latest sunpy.map and sunpy.wcs