Arm Kits: Overhaul examples

[daverolli]

Suggested new examples (general to all kits):

• Forward Kinematics (show going thru preset joint waypoints)
• Forward Kinematics (controlling individual joints from sliders in Mobile I/O App)
• Inverse Kinematics (show going thru preset end-effector waypoints)
• Inverse Kinematics (controlling end-effector pose from sliders in Mobile I/O App)
• Gravity Compensation (with admittance control to hold steady)
• Impedance control (virtual wall or spring)

Suggested new examples (6-DoF w/ Gripper only):

• Teach Repeat (using Mobile I/O for input?)

Anything else?