Physical destruction, bugfixes

Recent changes:

• Added destructible body type: BodyFracture (it supports three destruction patterns).
• Performance boost in spatial subdivision.
• Removed intersection mask from BodyWater, it intersects with parent node now (like grass).
• Support of cylinder collision shape.
• Joints with softness set must be re-adjusted.
• Added full CCD for spheres and capsules.
• 'reflection' parameter of BodyWater is renamed to 'absorption'.
• Fixed assert in GUI on video mode change.
• Fixed sectors/triggers infinite recursion.
• Saving/restoring array iterators in UnigineScript.
• Fixed incorrect UV data of water in DirectX 10/11.
• Children particle systems with shift emitter use parent particles as emitters.
• Added more samples of particle systems.
• Tessellation optimization gives up to 30% performance boost.
• PSSM shadow geometry replication by geometry shader (controlled by the folowing console variables: gl_render_use_geometry_replication, d3d10_render_use_replication, d3d11_render_use_replication).
• Tesselated triangles count can be seen in 'RPrimitives' profiler counter.
• Added 'Reduce Mesh' feature into MeshViewer: it removes invisible inner triangles.
• Screensaver launch and power off blocking with running engine on Windows.
• Fixed wrong UV data in WidgetSpriteShader.
• Even more speed optimizations and minor bugfixes.
• Updated documentation on UnigineScript library.

Physical destruction of objects:

Another sample (also can be found in update Unigine SDK):