Update computer naming to suppress output

Send the computer name and localhostname to the null device as its not
necessary to print to the stdout

Issue: #18
Update print function for options

Don't want to change the order of things again on the sourcing of files
and helper functions, so just put in a basic print statment for the help
menu if the user puts in a bad flag.

Issue: #18
Update Brewfile with homebrew cask installations

- Tap phinze/homebrew-cask
- Install homebrew cask
- Install Alfred cask
- Install Dropbox cask
- Install iTerm2 cask
- Increase Alfred search scope to include caskroom

Issue: #19