NDN-CCL

The ndn-cxx security library v2 uses the Pib and Tpm classes to support certificate format v2 and related operations. These should be ported to CCL and deprecate IdentityStorage and PrivateKeyStorage. Specifically, we should port:

• https://github.com/named-data/ndn-cxx/blob/master/src/security/pib/pib.hpp
• https://github.com/named-data/ndn-cxx/blob/master/src/security/pib/pib-memory.hpp
• https://github.com/named-data/ndn-cxx/blob/master/src/security/pib/pib-sqlite3.hpp
• https://github.com/named-data/ndn-cxx/blob/master/src/security/v2/certificate.hpp (as CertificateV2)
• https://github.com/named-data/ndn-cxx/blob/master/src/security/tpm/tpm.hpp
• https://github.com/named-data/ndn-cxx/blob/master/src/security/tpm/back-end-mem.hpp
• https://github.com/named-data/ndn-cxx/blob/master/src/security/tpm/back-end-file.hpp
• https://github.com/named-data/ndn-cxx/blob/master/src/security/tpm/back-end-osx.hpp