Parametric pulley as module: show more then one at a time

This is a "modular" version of http://www.thingiverse.com/thing:16627. It produces exactly the same Pulleys, but now you can call the module multiple times within one drawing.

Pulley types: MXL, 40DP, XL, L, T2.5, T5, T10, AT5, HTD (3mm, 5mm, 8mm) and GT2 (2mm, 3mm 5mm).