Merge pull request #16 from akadamson/master

update master from experimental and release 0.4.3
Merge pull request #20 from akadamson/master

0.4.4 release
Merge pull request #21 from akadamson/master

added delay to startup to allow gimbal to settle
Merge pull request #22 from akadamson/master

updated startup delay with slow flashing led