* adding columnify and ember-cli-cjs-transform

* add yargs-parser

* remove vendored yargs-parser tokenizer and use cjs transform to import it from actual yargs-parser

* add clear command that clears the log, but maintains history

* make codemirror have no gutter and be auto-height when rendered in the console output log

* add fullscreen command and hook up fullscreen toggle button

* hook up copy button