Moved WhileyWeb JavaScript code into separate file, leaving only global variables needed for the template in index.html.
Removed extra marker from webpage.
Added nicer status messages for compile/run/save actions.
Made output console more noticeable. Note: some styles are not supported in IE7 and below.
Fixed bug with error messages containing : not displaying properly.
Added new UI for viewing error messages. Tidied up some HTML/CSS/JavaScript.