Fix custom path

Personal bin, homebrew-installed executables, rest of the path (rbenv
shims, system executables, etc.)
Remove vim aliases

We’ve learned that muscle memory, and the aliases were sometimes
resulting in Vim 7.3 being run rather than 7.4. I need my relative AND
absolute numbering at the same time.
Raiding @croaky's dotfiles for packages

Everyone knows that basically you just want to clearly and obviously
say what you mean. Make it easy, however, and of course you might not
clearly explain what you mean.