CMake: Enable Boost_USE_STATIC_LIBS

Just a simple test to see how merge request work.

For distribution purposes it is often easier to link against the static libraries of boost. Enabling Boost_USE_STATIC_LIBS in CMake previously did not have any effect. If the flag is not explicitly set boost will be linked dynamically as before.

See merge request !1

- Remove explicit defines for dynamic linking if the flag is set
- Define BOOST_TEST_MAIN to enable running unit tests with static linking

fix in urdf model processing: cylinder axis definition differ in coin and urdf (thanks to Markus Sigg for sending the fix)

increase version number

fix: movement of nonactuated robot parts in simulator

v2.3.26

Conflicts:
	VirtualRobot/Visualization/CoinVisualization/CoinVisualization.cpp

BoundingBox toXML

Fix bug with cloneUniteSubset() where sensors attached to a robot node without a child node would get lost

Switching to NDEBUG preprocessor define
Tidy up cmake files
Remove some unnecessary checks

played around with some coin3d related settings to fix black-screen offscreen render bug
convenient init method

Removed some warnings on windows.

Conflicts:
	VirtualRobot/Visualization/CoinVisualization/CoinVisualizationFactory.cpp

removed renderOffscreen and get focal length