Updated the addin file for 2013
Project and solution files for 2013
Whitespace
Added the Purge Unnamed RefPlanes command
Added readme with a link to the projct page
Small edit
Added license file cleaned up readme
Fixed the Purge Unnamed RefPlanes command
Turns out that unnamed refplanes internally have a name - "Reference Plane".
We have to test for that and not for an empty string.
Added some links to readme
Forgot to change the readme extension
Formatting
Clean up
Merge branch '2013'

Conflicts:
	PurgeUnnamedRefPlanes.cs
Purge Unnamed Ref Planes rewrite

Instead of relying on the default name it actually checks the parameter.
Small change in the dialog test
Text teak

Conflicts:
	PurgeUnnamedRefPlanes.cs