Additional bash script enhancements

[mdo]

• Add parameter for first or subsequent runs (so we can skip general stuff)

• Load favorite Terminal theme

  curl https://raw.githubusercontent.com/mdo/ocean-terminal/master/terminal-ocean-dark.terminal > $HOME/Downloads/terminal-ocean-dark.terminal
  open ~/Downloads/terminal-ocean-dark.terminal

• Bluetooth and sound in menu bar

• Mouse and trackpad speed, right click

• Disable sound effects

• Disable auto-dim screen