New demo scripts.

Demo scripts:
* Drive to table
* Manipulation
* Drive to table and return
Fixed a syntax error in drive to table.
Getting classy.

Demo scripts now classified (badly) to allow common code and
reduce copypasta.
Somewhat better alignment.

Arm alignment from linear regression on 25 points.
Manipulation demos.

This is the code used for manipulation demos.
Arm position tweaked over by a few mm.
Manipulation demo now includes driving up to table (so collision map
has full table in it.)
Increases gripper collision size.

Increases length of gripper body collision box from 13 to 15 cm.
This should hopefully fix issues w/ gripper colliding with table.
Day 2 trials, model edits. (committed before M30)

Moves arm 1 mm to left.
Replaces compressor collision mesh with a box that encompasses
the valve and gauge assembly.
Increases the length of the gripper collision box.
Honestly, I'm not even sure. Final manipulation demo.

This is the final manipulation demo code. Not sure what changed
here.`
Updated rviz config files.