Removing bitdeli from the README.
Switching to more standard markers for vim code folding.
Adding some skip-if-already-loaded code.
Making all the keybindings customisable.
Adding <C-U> to the nnoremap commands.

...it protects against accidentally getting :'<,'> in your command if
visual mode was active when the keymapping hit.
Whitespace changes to the docs.
Adding Dhruva Sagar to the credits.