mtl abstractions for Pure Data

mtl is a group of abstractions that make Pure Data a lot easier to use!

Features:

This collections groups abstractions by their functions rather than their author.
It classifies many popular abstractions and externals through a unified help system
It provides a unified architecture for:
- Timing or synchronizing events, sounds and video
- Saving the state of a patch at different scopes
- Loading, managing, configuring and playing sound samples
- Playing and managing movie files
- The creation of dynamic 3D structures