Edit SolvePnP to make it look more like CalibrateCamera, with wrapper patch, based on CalibrateProjector.Add new IntrinsicsJoin node

Hi Elliot,

Just wanted to say thank you for all the work you're doing with OpenCV and vvvv, and to share that I have been using it successfully to calibrate / reposition fixed focal projectors for a projection mapping project.

Because of the fixed focal, I ended up using and making small changes to the SolvePnP node, to make it work more like CalibrateCamera, and also hacked an "IntrinsicsJoin" node to be able to user vvvv matrices as input to solvepnp (which turned out quite useful as the guess input for CalibrateCamera too).

Those changes are rebased in this commit, feel free to use any of it if it can help


/Benjamin