2005-02-13 Moritz Schulte <moritz@g10code.com>

• gcrypt.h: Declare new functions: gcry_ac_data_encrypt_scheme,

gcry_ac_data_decrypt_scheme, gcry_ac_data_sign_scheme,
gcry_ac_data_verify_scheme, gcry_ac_data_encode,
gcry_ac_data_decode, gcry_ac_data_to_sexp, gcry_ac_data_from_sexp.
New types: gcry_ac_emsa_pkcs_v1_5_t, gcry_ac_ssa_pkcs_v1_5_t,
gcry_md_algo_t.
New enumeration lists: gcry_ac_scheme_t, gcry_ac_em_t.

• libgcrypt.vers: Added new ac functions.
• g10lib.h: Declare function: _gcry_pk_get_elements.
• mpi.h (mpi_get_ui): New macro.

Declare function: _gcry_mpi_get_ui.