XMLless Kee Challenge

With no major bugs reported I am pushing this as a release. I just fixed a small bug I noticed of it not functioning on linux due to missing dllmaps.

1.7 User entered Challenges

Working version with both xml file and user entered challenge

1.6: Got PLGX builds working for windows machine, Linux machines coming so…

PLGX release of KeeChallenge with auto selecting Yubikey as an option