Squashed '.vim/bundle/SkyBison/' changes from a58751c..6df7e3b

6df7e3b Merge pull request #9 from jamessan/patch-1
0e1fa16 Only apply LineNr highlight to list header
ead6477 Markdown formatting fixes
8b4ed0b Added miscellaneous section to docs

git-subtree-dir: .vim/bundle/SkyBison
git-subtree-split: 6df7e3bb7d86161c0b8894acc202dabd78560499
Merge latest SkyBison, 7dfc8b347df9e86ee01d2e31ed51f761e12673ec.