whitelist firmware 3.3
update ykdef for version 3.3
add the new otp pids when opening key
Merge branch 'master' into feature/v3.3
add documentation for new mode flags
correct comment for U2F + CCID mode
add new pids to the udev rules
Merge remote-tracking branch 'remotes/origin/feature/v3.3' into upstream-master
Doc fix.
Fix URLs for opensource.y.com -> developers.y.com move.
Version 1.15.3.
Fix markup.
Abstract.