Add documentation for the Qt modules.

Change-Id: Ia2264b11412c79e1d53f1d57fba4ead7f0695f83
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
(cherry picked from commit a95c350c1d697f4c5b776e08ba426e6a228cd90c)
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
Add test case for checking the list of build system files.

Change-Id: Ie3f5a0e7b3b0ae4ef96670ae8b0db3cd18d248b4
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
(cherry picked from commit ba004ce90327186a7f00ce53bb101b00b01c33fd)
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
Add another build graph sanity check.

Change-Id: I9860fdea260ee53a04c5ba4e630ddf7cf4bfe7f6
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Remove unused code from toolchain detector.

Change-Id: Ib897f5a9b44c41f87807b2f912dc0d5347d2417f
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>