comp: reject .comp files whose names dont match the component name
tests: verify that comp rejects .comp files whose names dont match the component name
Docs: add info on the servo axis calibration assistant

Signed-off-by: John Thornton <jthornton@gnipsel.com>
Docs: add link

Signed-off-by: John Thornton <jthornton@gnipsel.com>
Merge remote-tracking branch 'origin/v2.5_branch' into 2.6