external maintenance fork 0.6.2.x

[zandbelt]

A maintenance fork was started here:
https://github.com/OpenIDC/cjose/tree/version-0.6.2.x

@rnapier @jogu @ajishna @veselov @zachmann @mpsun @securedimensions @traeak
I have merged your PRs, please check and see if you need more

when done I'll ask package maintainers to update 0.6.1 in their repositories to 0.6.2 against this fork

closes #103

[zandbelt]

I have released 0.6.2 here:
https://github.com/OpenIDC/cjose/releases/tag/v0.6.2
@moschlar @jdennis @puiterwijk please consider this 0.6.2 release for your package repositories:
@linuxwolf @balthorium please adapt this project to include a pointer to the fork above