Add narrative documentation on how we do binary deployment

まだ誰も着手していません。

Now that our https://github.com/mapbox/cpp/blob/master/glossary.md is fairly complete, it is a good time to add new, narrative docs that tie together glossary terms.

In particular, there is a need for a binary deployment doc that explains the flow from C++ source code -> node addons -> binary distribution.

Here is a first stab at listing things to cover in this doc:

We use mason for:

- distributing [pre-compiled](https://github.com/mapbox/cpp/blob/master/glossary.md#precompiled) (aka binary) static libraries for C/C++ code. And in rare cases shared libraries.
- distributing source code of header-only libraries
- distributing binaries of [executables](https://github.com/mapbox/cpp/blob/master/glossary.md#executable) (aka command line programs).

We use node-pre-gyp for:

- Binary deployment of node C++ addons
- When those node C++ addons have external C/C++ dependencies we use mason to pull packages for them
- Soon we'll open source https://github.com/mapbox/mason-js which will make these more seamless (no need for the mason bash scripts)

TODO:

- integrate old node-pre-gyp docs into this repo and modify them to link to the glossary and this repo where appropriate. E.g. https://github.com/mapbox/node-pre-gyp/wiki/External-libraries, https://github.com/mapbox/node-pre-gyp/wiki/FAQ

glossary.md と、External-libraries および FAQ に関する既存の node-pre-gyp wiki ページから始めます。C++ ソースから node addons を経てバイナリ配布に至る文書化されたフローを、mason と node-pre-gyp を含めて追跡し、その後、関連する古いドキュメントを用語集および関連資料へのリンク付きでこのリポジトリに統合します。

索引モデルが issue の本文から書いたものです。