Initial commit
plasticboy's indent/markdown.vim
Some stylistic alterations (names, etc)
Initial version, markdown lists working.

  - Tests files included, markdownsnippets.vim tested and working as
    expected.
  - Surprisingly well-behaved! Smugface.
Removed explicit evaluation of current indent

This is not necessary, the docs say that an `indentexpr` return value
of -1 means this anyway. This has been set as a variable for clarity.
Removed the mystery regex.

There might be a reason why it's there that I'm yet to encounter but I
can't figure out what it's for. It passes checks against
markdownsnippets.md so I'm going to tentatively take that as a "not
needed". In the event something doesn't work, I'll work out a new
exclusion pattern that is clearer (and quite possibly, simpler).
Add README
Add MIT license
Renamed tests directory, they're not really tests per se