OK, here is a Eagle library update with a preliminary addition of the 3.5 and 3.6 series teensy boards. If someone could have a look at them to see if they match up, that would be great.
Constantin, I just found a problem:
Your pin called VUSB1 (on the USB-connector) is NOT connected to VUSB on the T3.6 - I fear this can lead to heavy problems.. i'd choose an other name (5VOut?) and disconnect both in the library.