Remove backdrop.
Switch to noir color scheme.
Change up icons a bit.
Revamp padding around everything.
Try out Lora for the editor font.
Revert "Try out Lora for the editor font."

This reverts commit 757357b76b9883423386c246b603ffd3b5c6fe6f.
Update the intro doc.
Remove unnecessary key from currentDoc header.
Use semantic <menu> and <menuitem> tags for main menu.
Switch from Georgia to Libre Baskerville in the editor.
Start wearin’ purple.
Restyle font controls.
Make notes search bar look inset.
Re-enable source maps in browserify.
Update intro doc.
Fix version on db.js
Add some preliminary Dropbox integration stuff.
Add some preliminary keyup handler stuff.
Make stuff a different shade of purple.
Change up Dropbox logo.