* tools/card-tool-keys.c: Rename to card-keys.c.
* tools/card-tool-misc.c: Rename to card-misc.c.
* tools/card-tool-yubikey.c: Rename to card-yubikey.c.
* tools/card-tool.h: Rename to gpg-card.h.
* tools/gpg-card-tool-w32info.rc: Rename to gpg-card-w32info.rc
* doc/card-tool.texi: Rename top gpg-card.texi