Update README.markdown
[wip] Add CONTRIBUTING.markdown

Will regret this later.
[test] Added Spork to handle automated testing.
[test] Updated formatting and made augroup_spec more flexible.
[integrations] Add gitter.im
[wip] Allow a change in the build generator.

  This relates to issue #26.
Bumped up the plugin, dark times.
Covered``plugin/cmake.vim`.
[wip] Strip out references to syntastic and ycm in sources.
Covered buffer and target specs.
Updated more plugins, increasing the green status.
Ensure global autoload logic was sourced in.
[wip] Update gems, improved specs.
[wip] 98.5% test coverage. We're ready.
[wip] Fixed resolution for root source directories.
[wip] Update docs and README. Fixed up commands.
[wip] Add extension support into CMake!!!
[wip] Make sure we see what version of Vim we're building against.
[wip] Add more tests to fetch default function names from extensions.
[wip] Covered extension support for cmake.vim.