expose width/height as ExampleBrowser options.

suppress lack of 'site' support message in MJCF importer
suppress lack of 'plane' visual support in urdf/sdf import
getBodyName default to "" to avoid breaking cloudsim
expose bodyName when requesting body info (sdf/mjcf import)
pass optional "options" string to pybullet.connect method. this can be used for --opengl2 flag in GUI mode (or other flags)

examples/ExampleBrowser/OpenGLExampleBrowser.cpp

@@ -871,6 +871,16 @@ bool OpenGLExampleBrowser::init(int argc, char* argv[])
 	
 	int width = 1024;
     int height=768;
+
+	if (args.CheckCmdLineFlag("width"))
+	{
+		args.GetCmdLineArgument("width",width );
+	}
+	if (args.CheckCmdLineFlag("height"))
+	{
+		args.GetCmdLineArgument("height",height);
+	}
+
 #ifndef NO_OPENGL3
     SimpleOpenGL3App* simpleApp=0;
 	sUseOpenGL2 =args.CheckCmdLineFlag("opengl2");