Cleaned up ball detection to make it faster and slightly more accurate.

Made the offline system able to move backward in streams.

Signed-off-by: Shannon Fenn <shannon@slinbox.(none)>
Merge branch 'develop' of git@github.com:nubots/robocup.git into develop

Conflicts:
	Vision/Modules/balldetector.h
	Vision/visioncontroller.cpp
Signed-off-by: Shannon Fenn <shannon@slinbox.(none)>
Fixed green horizon issue with it being on the bottom of the screen with no green present - now it is clamped to the top.

Signed-off-by: Shannon Fenn <shannon@slinbox.(none)>
Merge branch 'develop' of git@github.com:nubots/robocup.git into develop