Adds testing of returned parser values for unset values.
Adds omitted 'MHz' and 'GHz' grammar to fstop, creates examples input
file
Adds support for arbitrary filenames enclosed in quotes.
Adds support for specifying units of power (dBm, W, mW, uW, or nW)
updated version number while testing new tutorial - kurt
Prints .mes file options more nicely
Fixed S21 issue and minor bugs
Merge branch 'parser'

Conflicts:
	pattern-measurement/rangemeasure.py
Adds support for specifying frequencies with fcenter and fbandwidth, changes 'sgh' option to 'cal'
Corrects accidental uncommenting of a comment
Merge branch 'parser'
Changes old sgh references to cal
Gets first pass at pattern surface and vector plots working; creates useful modules
Gets 2d polar pattern plotting working, both linear and dB; cleans up functions and demos in various files; adds test script for PatternPlot
Cleans up notation and comments
Merge branch 'SpiffyPlots' into dev-analysis-tools