adds ability to enter one line of ruby and hit enter. shows command history
updates key event handler to run on key down
updates keydown handler to skip empty commands
adds compass support with sass stylesheet
moves styles from html to sass
removes uneeded auto-clear option. the command-mode interface can handle that
updates .gitignore to ignore .sass-cache directory
adds gemfile for development dependencies
adds intructions about compass to readme
adds "fork me on github" banner
adds styles for split layout
moves actions to footer
adds support for using up/down keys to navigate history (just like readline)
adjusts font size to match ace editor
adds call to preventDefault when key handled
adds js to force focus on input field by default
adds ability to hit shift+enter to run code listing
adds window.instance_eval so that alert,confirm,console,jQuery and other methods are available
fixes line endings when nothing printed
adds explicit focus call to ensure editor is not highlighted by default