Remove vim-rails.
Add vim-rails as a submodule.
Move vim-git to a submodule.
Move command-t to submodule.
Move nerdtree to submodule.
Move tomorrow-theme to submodule.
Move vim bundles to submodules.
Add powerline-bash.
Ignore another vim file.
Always exclude .git directories when grepping.
Add ./bin to PATH.
Only source .bashrc once.
Use the commands recommended by rbenv.

https://github.com/sstephenson/rbenv/#installation
Add another grep alias to exlude log/ and tmp/.