Add poll function to canopen device
Remove poll thread from esc_coe

Add poll/recover to bus

Modify idle loop of dt_ctrl to poll all busses and recover when
needed and possible.

Conflicts:
	controller/controller/controller_load.h

This allows both the azimuth and the elevation control file to include the
ethercat device

Update to bison 2.6

Conflicts:
	controller/block/block_servo_state.c

Better interface with prediction of next pass and automatic
update from celestrak

Add speed warning to azimuth controller.

Removal off old stuff from simulator
Make our clock explicit instead of magic number.

Add external enable output to mech html page

Also make predictions more reliable by using position/velocity algorithms