added LICENSE.txt and AUTHORS.txt file

add MultiBody Custom Creation example, to show how to import data from a URDF file and fill up your own data structures.
add btMultiBody::setBaseWorldTransform method
todo: fix cmake build, this patch is premake only

examples/Importers/ImportURDFDemo/URDF2Bullet.h

@@ -16,13 +16,13 @@ class MultiBodyCreationInterface;
 void printTree(const URDFImporterInterface& u2b, int linkIndex, int identationLevel=0);
 
 
-
 void ConvertURDF2Bullet(const URDFImporterInterface& u2b, 
-												MultiBodyCreationInterface& creationCallback, 
-												const btTransform& rootTransformInWorldSpace, 
-												btMultiBodyDynamicsWorld* world,
-												bool createMultiBody, 
-												const char* pathPrefix);
+			MultiBodyCreationInterface& creationCallback, 
+			const btTransform& rootTransformInWorldSpace, 
+			btMultiBodyDynamicsWorld* world,
+			bool createMultiBody, 
+			const char* pathPrefix);
+
 
 #endif //_URDF2BULLET_H