SmartCard-HSM improved token, PIN and EC key support

This pull requests improves the SmartCard-HSM driver by

* providing support for a token label via a tokeninfo structure stored in EF 2F03
* adding support to unblock the user PIN in a SO session via C_InitPIN()
* making EC public keys available from card generated certificate signing requests stored in place of the certificate

Unblocking the PIN is available in SmartCard-HSM version 1.0 or higher.

With these changes the SmartCard-HSM driver is feature complete for version 0.14