fix typo in cmake/README.md

Test importing in a variety of configurations:
  - Two files in the same Go and proto package.
  - Two files in the same Go package, but different proto packages.
  - Two files in different Go packages, but the same proto package.
  - Public imports.
  - Two files in the same package which each import a different
    Go package with the same name. (i.e., demonstrate whether rewrites
    of package names cross file boundaries.)
  - Imports which conflict with standard imports (e.g., "fmt").

Fix to generation of verify methods for bytes

Renamed a few more constants to the new style