Cleaned up estop schematics.

Cleaned up first revision estop schematics and made eps figures.
Made a schematic of the estop circuit on HARLIE (needs check).
Estop document done (first draft, needs figures, etc).
Merge branch 'master' into pcb_revision

Conflicts:
	Electronics/eStop/estop.sch
	Electronics/eStop_remote/remote.sch
Added symbol for boost converter.