Set 'localhost' as hostname.

http://biomedicalontologies.com/2012/11/14/fixing-java-net-local-host-name-unknown-error-on-mac-os-x/
Add common-aliases oh-my-zsh plugin.
Add Apple software update list.
Add some aliases.
Make a function to install brew casks.
Add some configuration (man, hist, grep).
Make rebase safer on MacOS X.