Compare generated JSON to the original descriptor.

A bunch of experimental files to test out the concepts of generating the
descriptor file instead of manually updating an outdated static copy.

File breakdown:

  compare.json (Will be renamed in the future)

    - The generated file that I'm comparing to new.json.

  new.json (Will be deleted in the future)

    - Reference of the v0.18.0.json file.  Should not be named new.json.

  descriptor.json (Developer maintained)

    - Inform decisions to the descriptor generation.

  t.js

    - An aptly named script that runs to generate the compare.json file.
      It's going to be way smarter and named something not experimental
      once I've figured out a spec.

  types.json

    - Maps functions/classes/structs/types/etc. to JS, C, C++, and
      Emscripten (in the future).
Updated binding to match how git-utils handles libgit2.
Remove documentation on CMake.
Automate the building of all libgit2 types.
Library changes.
Removed all generated C++.
Automate dependencies.
Generating more types and safe identifiers.