Homebrew: Add comments.
Homebrew: check for issues with `brew doctor`.
Homebrew: install brew-cask.
Homebrew: enable Bash completion.
Make all scripts executable.
QuickLook: add dependency on Homebrew script.
Move loading of defaults+ to its own script.
Terminal: add icon to dock.
Add trackpad configuration.
Add chruby and commonly used Ruby versions and gems.
Homebrew: Add tap for homebrew/versions.
QuickLook: Remove notes about needing updated version.
Add docukutil, to ensure we can manipulate the Dock.
Terminal: Fix filename for including 'dockutil'.
Finder: Add a lot of settings for the Finder.

Also includes some settings for desktop and file dialogs.