Merge pull request #46 from ironbishop/testing

Never show no search results
remove Teambox as it's not open source anymore, see http://teambox.com/open-source/, close #29, thanks to @arthurlutz for the pointer
remove Wikidot as it's not open source anymore, see https://twitter.com/jancborchardt/status/299441124202930176, close #41, thanks to @yuwash for the notice
add TiddlySpace and its logo, see Issue #8
Add warning message to search