Removed old Nunchuk sample sketch. Cosmetic changes.

Added support to wiimote encryption, classic controller support, several
bugfixes and a new sketch with a classic controller impersonation
example.

added function for joystick and accelerometer

now with support for streaming bytes from Arduino

now fully bidirectional

now with support for sending bytes to Arduino

improved comment

cosmetic improvement

minor addition

now with BSD license

first stab at documentation

separated library from demo code

mostly functional by now...

first working example of joystick input

initial checkin; recognized as nunchuk