* restructured JavaScript using backbone.js
* replaced highlight.js with CodeMirror for its editor
* added CodeMirror Solarized (dark) theme based on Ethan Schoonover's solarized.vim
* changed `POST /document` to accept real JSON
* cleaned up template and stylesheet
* restructured JavaScript using backbone.js
* replaced highlight.js with CodeMirror for its editor
* added CodeMirror Solarized (dark) theme based on Ethan Schoonover's solarized.vim
* changed `POST /document` to accept real JSON
* cleaned up template and stylesheet