UI: prevent global data access for web worker.
Demo: CSS autocompletion.
Demo: colored download button.
UI: removed dark theme and fullscreen.

Reason: decision to use those features and many more should rest upon the user's
shoulders.

Removes the solarized.css requirement.
Visually separate the editors.
Rely on my implementation of Map for now.
Improved trick for inline CSS.
Updated esprima
Better demo background image
HTML: character reference.
HTML: character references part 2
html: first tests, more character references
html: tag name state