Squashed 'bundle/vim-csyn/' content from commit 3ee4424

git-subtree-dir: bundle/vim-csyn
git-subtree-split: 3ee442435809d5a4f7ba212b89effdd72f241ba9
Merge commit 'a9c6295437e494f860e02a1ff94346eda2e53415' as 'bundle/vim-csyn'