v0.3.0

wikisync now works with any MediaWiki wiki the same way: there is no default
wiki, and each working folder remembers the one it was pulled from.

Documentation is now at https://cameronbrooks11.github.io/wikisync/.

Changed

• No default wiki. wikisync no longer assumes Appropedia. The first pull
  into an empty folder needs --host (and --path if api.php isn't under
  /w/). After that, pull and push in the folder use the wiki recorded in
  its manifest, and refuse a different --host or --path, so a folder only
  ever talks to one wiki. (#32)

  Upgrading: folders you already pulled into record their wiki, so they keep
  working with no --host. Only a first pull into a new folder changes:

  wikisync pull --host www.appropedia.org --dir ./pages "Page"

• just test-live needs WIKISYNC_TEST_HOST. (#32)

Added

• User documentation: getting started, every command and exit code, bot
  passwords, the working tree and conflicts, and development. It's published
  with GitHub Pages. (#25)
• CHANGELOG.md, CONTRIBUTING.md and SECURITY.md. Security reports go
  through GitHub's private vulnerability reporting. (#25)