git revision fix
added grid function to plotting class
removed unused code
initial update to Python plotting examples - Web
Merge branch 'master' of https://github.com/ibell/coolprop

Conflicts:
	CoolProp/gitrevision.h
Merge branch 'master' into python-examples

Conflicts:
	CoolProp/gitrevision.h
moved python-plotting web doc files to Python subfolder
added `autoclass_content = 'both'` option to the sphinx config file
added the `CoolProp.Plots.Common` module to the apidoc
added addition python plotting examples (code only, text to follow shortly)
updated python plotting web documentation
changed `plt` to different name
fixed subplot example (placement of subplots)
finished text
cleaned up the old API style python plotting examples