Improve comments throughout and add descriptive print method
Added start of potential calculation in python for demonstration purposes
Merge branch 'master' of https://github.com/msarahan/QSTEM

Conflicts:
	python/probe.py
-Fix bug from integer division in aberration function calculation.
-Add phase plotting methods.
Add reciprocal space calibration method
Fix some bad calls to ImageIOPtr when saving single atomic potentials
Add several labels, add some signals/slots to TDS options.  Insert placeholder for Chaco plot