* Set up Vundle in vimrc.
* Delete old copies of vim scripts.
* Bundles are automatically set up as referenced submodules.
* Ignore .netrwhist files given presence of submodules.
* Set up vundle in install script.
Features include:
* :Gblame for interactive vertical split with git blame output.
* :Ggrep to search the work tree (or any arbitrary commit) with git grep,
skipping over that which is not tracked in the repository.
* :Glog loads all previous revisions of a file into the quickfix list so
you can iterate over them and watch the file evolve.
* :Gbrowse to open the current file on GitHub, with optional line range
(try it in visual mode).
