Smoketest release candidate

The motivation to do this is to ensure that buildmaster does not spread completely broken builds that unnecessarily strain other employees.

How to perform smoketest

• unpack release package zip into a temp directory
• open index.html, check that links work
• start demos and check that they work
• and use own judgment

Note that if build is broken, it might still be testable, ask Product Manager or Test Manager if broken builds should be announced by performing testing request.