Scisalt

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* Added git checking

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* Updates to ion modeling (2D, etc.)
* Updates to NonUniformImage, support code
* Add periodictable dependency
* Color updates
* Better piecewise function

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* Added ion modeling

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* Added personal ellipse fitting scisalt.scipy.hough_ellipse.
* Added an Imshow_Slider_Array for perusing an array of images.
* More config options for scisalt.logging.mylogger.
* Added gaussian function at scisalt.numpy.
* Behind-the-scenes updates and bug fixes.
* Progressbar now includes times, percentages.

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* Can now run githubtunnel from the command line

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* Fixed colorbar in scisalt.matplotlib.imshow
* Updated documentation with the start of a new manual