DomainParameterSetEcdh is now able to produce matching EcParameterSpec
objects
PublicKeyReference: modified toString method to allow both for formatted
and unformatted output
generalized method from DomainParameterSetEcdh to return an
AlgorithmParameterSpec for any DomainParameterSet. This can then be used
e.g. for key generation
Merge pull request #25 from slutters/persosim/cvCertChain

Persosim/cv cert chain