New command framework for C++

[cbennet]

This updates RobotBuilder to create the new c++ commands. Some cleanup and formatting is still required.

[sciencewhiz]

If a command does not require a subsystem, the value "None" is used in the export, which doesn't compile. The templates need to check if the subsystem is None.

For example in the .h
#include "Subsystems/None.h"
explicit AutonomousCommand(None* none);

in the .cpp:
AutonomousCommand::AutonomousCommand(None* none) :m_none(none){
AddRequirements({m_none});

[sciencewhiz]

This is the file I'm using to test
robotbuilder-test-save6845451186554322753-339787238534500.yml.txt

[sciencewhiz]

I still get some compile errors when I build with the project posted above.

[sciencewhiz]

I've fixed several issues over the weekend. Two more I've found are that commands that don't require a subsystem don't export correctly in RobotContainer JoystickButtons, they subsystem export with &m_none instead of blank. Also, parameters don't export correctly.

[sciencewhiz]

Comments from @prateekma:

The examples on the allwpilib repo use lowercase folder names for subsystems, commands, etc.
Inconsistent usage of <> and "" for includes (project includes should use quotation marks, WPILib includes should use angular brackets).
Constants in subsystems can be static constexpr to avoid having to define them in the source.
use of tabs in some places and needs indentation fixes

[sciencewhiz]

Need to standardize on the template names with Java and remove OI