FewDee now works when compiled in 64-bit systems.
Makefile: explicitly linking with the GL library.
Using 'toStringz' instead of 'ptr' in examples.

I had already changed this in most examples, but two cases were still
using .ptr to (supposedly) obtain a zero-terminated string.
Added InputManager.removeTriggers().

This has proved to be useful.
Added new input triggers: DummyTrigger and RepeatingTrigger.