* gpg.sgml: Document "addcardkey" and "keytocard".
* apdu.c (open_pcsc_reader): Do not print empty reader string.
* keygen.c (ask_algo): Allow creation of AUTH keys.
* keyid.c (usagestr_from_pk): New.
* app-openpgp.c (app_openpgp_storekey): Call flush_cache.
* keyedit.c (keyedit_menu): New command "keytocard"
(keyedit_menu): Bad hack for the not_with_sk element.
(show_key_with_all_names): Print the usage.
(find_pk_from_sknode): New.
* card-util.c (card_store_subkey): New.
(copy_mpi): New.
* cardglue.c (agent_openpgp_storekey): New.