JPSSnagg

The process of updating version informaiton (in src/nagg.h) and in various
document files (e.g. README, RELEASE.txt) were done by hand.  Automize most
parts of this process.  Post reminder of files, e.g., doc/nagg.docx, that
require manual changes.
Also show post-release tasks.

Tested: koala (svn diff the effects and built successfully.)