Add BulletWorldImporter: it takes the in-memory data from BulletFileLoader and instantiates objects in a BulletDynamicsWorld.

Note that BulletFileLoader is has no dependencies on BulletDynamics/BulletCollision.
Also added a custom build step to copy asset (.bullet and .obj file) into the executable folder
Made a few 'char*' 'const char*' to avoid compiler warnings

Extras/Serialize/BulletWorldImporter/CMakeLists.txt

@@ -0,0 +1,10 @@
+INCLUDE_DIRECTORIES( 
+	${BULLET_PHYSICS_SOURCE_DIR}/src
+	${BULLET_PHYSICS_SOURCE_DIR}/Extras/Serialize/BulletFileLoader
+)
+
+ADD_LIBRARY(
+BulletWorldImporter 
+btBulletWorldImporter.cpp 
+btBulletWorldImporter.h 
+)