Squashed 'Vim/bundle/indent-object/' content from commit 78fffa6

git-subtree-dir: Vim/bundle/indent-object
git-subtree-split: 78fffa609b3e6b84ef01ee4c9aba6d7435d7b18e
[vim] Add external bundle 'indent-object'
[vim] Add indent-object to bundle config
[bash] Add "md" function to combine "mkdir" and "cd"