Generated C++ doesn't compile

- The .cpp still declares the `setsourceN` functions
- VIsionPipeline include is wrong (should be `#include "vision/VisionPipeline.h"`)
- FindBlobs is missing a `cv::` namespace qualifier
- Includes the contrib module (and several others) even when it's not used, and may not compile on systems that don't or can't have it installed (e.g. FRC)