Squashed 'bundle/vim-dockerfile/' content from commit 964013c

git-subtree-dir: bundle/vim-dockerfile
git-subtree-split: 964013ca600510597b96b41a89d00e7a7b1bbaa1
Merge commit '78e3eb6cf9e0f5079341bf780d8f87211d8b56f1' as 'bundle/vim-dockerfile'
Merge branch 'master' of github.com:jupake/myvim