Also, I added quite a bit of doxygen documentation to btKinematicCharacterController. For the interested I created a repository over at github (https://github.com/martinfelis/bulletphysics2) that contains the changes I made.
There are also improvements to the camera movement. There is no more jittering (thanks to the insights I gained about btKinematicCharacterController) and also the horizontal movement is no more constrained = much more fun!
Oh, and here is the new (windows) version: iftpop_0.0.2. Go Try It! NOW!
Additionally, I spilled some wine over my desktop keyboard.