It drastically increases compile times and is bad style. C++ users
should be including what they use. We don't necessarily have to remove
WPILib.h, but it should at least be deprecated.
SampleRobot provides no benefits over RobotBase to advanced teams and
TimedRobot is recommended for everyone else.
A skeleton template for RobotBase was added.
The old headers were moved into folders because doing so avoids polluting
the system include directories.
Folder names were also normalized to lowercase.
