Better compatible with qt4.

* Q_PROPERTY MEMBER wasn't available, use READ and WRITE instead
* Disables namespace with qt4
* Updates default stylesheet to work with qt4 (no namespaces)

Unifies include/forward-declaration style in header files.
README status updates

AdvancedDockingSystem/include/ads/SectionContentWidget.h

@@ -7,7 +7,6 @@
 #include "ads/SectionContent.h"
 
 ADS_NAMESPACE_BEGIN
-
 class ContainerWidget;
 class SectionWidget;