Amend CHANGES for v2.0.2
Merge remote-tracking branch 'origin/2.0'
StateMachine: Pass font prop to individual items

This makes it possible to configure the font by changing StateMachineViewerWidget::m_font
Merge remote-tracking branch 'origin/2.0'
Replace the primitive QtCore library detection with something more powerful.

No more hard-coded version numbers all over the place, and far less
false-positives.
Fix Windows build.
use embedded graphviz on Windows with msvc
add graphviz's libcgraph as 3rdparty