Extract rspec vim bindings to thoughtbot/vim-rspec
Move `.vimrc.local` to the bottom of .vimrc

Having this file be sourced last allows user to
overwrite the configs in `.vimrc` without having to modify it.

* fixed file's path to work with `filereadable`
Add personal preferences
Remove my user specific configs from `gitignore`
Don't treat any of the plugins as submodules