expose b3PhysicsParamSetNumSolverIterations

split Visual Studio project generation batch file in regular and VR+pybullet+double precision build.
disable KUKA iiwa joint limit hack

build_visual_studio_vr_pybullet_double.bat

@@ -0,0 +1,8 @@
+
+IF NOT EXIST bin mkdir bin
+IF NOT EXIST bin\openvr_api.dll  copy examples\ThirdPartyLibs\openvr\bin\win32\openvr_api.dll bin
+
+cd build3
+
+premake4   --double --enable_openvr --enable_pybullet --python_include_dir="C:/Python-3.5.2/include" --python_lib_dir="C:/Python-3.5.2/libs"   --targetdir="../bin" vs2010 
+start vs2010