Big update! Preparing for my new position.

I needed granularity for different environments, which I lacked before.
See: I didn't have full access to update Ruby, so tmuxinator immediately
broke the script at ResComp.

Now I can define different locations, and install based on that. If I
need a new package, I can add a function in the script that leverages
some easy-to-use wrappers for installation.

TODO: Still need to add cleaner functions for zsh/tmux.