Add tool to generate sample strings from a description file.
Add tool to generate sample strings from a description file.

This takes some pains to work on narrow python2 builds on mac.  It
has not been fully tested in that environment yet.

The actual task is simple in code, but the idea is to provide a
easy-to-understand text file format that linguists and other
non-programmers can edit.

googlefonts/nototools,moyogo/nototools,googlefonts/nototools,googlefonts/nototools,moyogo/nototools,anthrotype/nototools,moyogo/nototools,googlefonts/nototools,googlei18n/nototools,anthrotype/nototools,dougfelt/nototools,dougfelt/nototools,googlefonts/nototools,dougfelt/nototools,anthrotype/nototools,googlei18n/nototools,googlei18n/nototools