Addressing issue #1056

Allow frustrum culling near/far distance configuration at compile time.

Renamed for consistency with Vecto2Scale()
Also renamed Vector3MultiplyV() to Vector3Multiply()

Support custom allocators

This could be required on texture packing ;)

Short non-looping sounds can sometimes think they need to keep playing and will output their first few frames again. This helps to break out of all the loops instead of just this one.

* Normal vbo not correctly updated