Robotic arm v2.1 (WIP)

I encountered some bugs, if you know how can I fix them, say in comments.
1. I can't adjust 'starting position' for the right joystick.
2. I can't make the bottom servo handle arm weight.

Consider that it's work in progress, if you want to stay up-to-date with revisions make sure to subscribe :)

v2.1
Fixed grabber leveling bug
Fixed base rotation bug