Brewfile: Remove unwanted installs

Remove `ack` since we will be using `ag` and remove JavaScript virtual machines except for Node.js.
Brewfile: Comment out unwanted installs

Comment out unwanted installs that seem interesting enough to keep in mind in the future.
Brewfile: Organize programming language installs
Brewfile: Add `ag` install
Brewfile: Add Go and Python installs
Brewfile: Add Laravel dependency installs
Brewfile: Add `hub` install
Brewfile: Add `heroku` install
Brewfile: Add database installs