The recipe map is now created automatically when you use any autopkg verb aside from "help" or "version". This also handles situations where we attempted to read an invalid recipe map (such as would be created in between RC3 and RC4) without rebuilding one first.

This makes the autopkg recipe search feature much more seamless, and is a lot closer to how the existing recipe location mechanism works in the release version (2.7.2).

Fixes #874.