[yt-dev] Issue #1030: Document the enable_plugins function (yt_analysis/yt)

[Nathan Goldbaum]

New issue 1030: Document the enable_plugins function
https://bitbucket.org/yt_analysis/yt/issue/1030/document-the-enable_plugins-function

Nathan Goldbaum:

This function parses the plugins file and allows the fields and functions defined there to be used in a script that imports yt using `import yt`. It needs docstrings, to be present in the API docs, and needs to be mentioned in the documentation section on the plugins file.