setup.cfg: fix packaging

[oliver-sanders]

MB, some wash up from #230 (forgot to test packaging).

• move options into [options] section
  • some were erroneously placed in the [metadata] section
• move package_data patterns into MANIFEST.in file
  • allows easy inclusion of entire file trees

To test try doing a non-editable install, then take a look at the files included in the installation.

$ tree $(dirname $(python -c 'import cylc.uiserver; print(cylc.uiserver.__file__)'))

You should see:

• The Python package and all of its modules (e.g. cylc.uiserver.app, cylc.uiserver.scripts.gui).
• The ui/ hierarchy including .css, .js and .woff files.
• The logo.svg file.

Requirements check-list

• I have read CONTRIBUTING.md and added my name as a Code Contributor.
• Contains logically grouped changes (else tidy your branch by rebase).
• Does not contain off-topic changes (use other PRs for other changes).
• Does not need tests (why?).
• No change log entry required (why? follow-up to work that has not yet been released)
• No documentation update required.
• No dependency changes.

[codecov-commenter]

Codecov Report

Merging #245 (2490135) into master (7b0a11c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #245   +/-   ##
=======================================
  Coverage   75.24%   75.24%           
=======================================
  Files          11       11           
  Lines         719      719           
  Branches      121      121           
=======================================
  Hits          541      541           
  Misses        153      153           
  Partials       25       25           

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[kinow]

Looks good. Tried master and this branch, both editable and non editable, and got the same final message with the test command: 13 directories, 141 files. New code looks tidier though 👍 🙆‍♂️

[datamel]

Thanks @oliver-sanders.