made camera move on keypress/mouse movement

[Metarus]

made keypresses affect camera movement and mouse this is using the modelPosition and modelYaw passed in to the render function; this should be cleaned up ideally pass in eyePos/direction or eyePos/yaw/pitch and calculate the rest. the camera stuff should also be calculated in a helper because render's main goal is to actually render the object, not set up the camera

[benjxia]

We can do that after we have an environment, right now we have no way of testing what Alan's suggesting. Let's merge and get pitch working first.

[Alanine42]

shoot just saw this comment...