First repo version of 2525 SVG files

Mike cannot install Git on his NG computer, for security reasons.  So I'm adding this on his behalf, with SSMC approval.  He's checking with NG security about getting Git approved for use on his computing equipment.

He is working on text to enhance the README, with details on naming conventions and the internal details of the files themselves.  He's also working on addressing anomalies that we've discovered and documented in issue '#16'.