Squashed 'bundle/vim-markdown/' content from commit 74c9c60

git-subtree-dir: bundle/vim-markdown
git-subtree-split: 74c9c60796ef10284ba26aaf38ffb39beae5f62c
Merge commit 'c9b7d8c7a84aeb0a7e0844e3fcea3a6ea90b44ab' as 'bundle/vim-markdown'
deleted vim-markdown from plasticboy