Moved to generic 'virtual_joystick' from /android/virtual_joystick

[stonier]

You want to update the public interface (used by concerts) as well.

Actually, we need to update the teleop rapp to conform to the parent teleop rapp, but I started a new issue for that one, #102

[kentsommer]

@stonier these two should do what you need, let me know if this isn't what you were asking for:

• https://github.com/turtlebot/turtlebot/commit/1f29c55d636a3b38efaeaceae3b27d40e3aedd43
• https://github.com/turtlebot/turtlebot_apps/commit/32b2907d4fa9bd7f8d6a8f9f7dd08e183d464846

[stonier]

:neckbeard: