Add git-subs script

A helper for the submodule command I use most frequently.
Add fasd bash setup script

fast is a cool shell tool for jumping to files and dirs

https://github.com/clvv/fasd
Ignore machine local emacs package working files

These files are created and edited by packages at runtime and will
be different from machine to machine.
Fix Postgres.app path manipulation
Add bash aliases for common vagrant commands