Add documentation for the Qt modules.

Change-Id: Ia2264b11412c79e1d53f1d57fba4ead7f0695f83
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Add test case for checking the list of build system files.

Change-Id: Ie3f5a0e7b3b0ae4ef96670ae8b0db3cd18d248b4
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>