14443A with higher baudrates support

I've managed to add support for 212, 424 and 848 kBps 14443A support. 214 and 424 seem to be running quite stable, 848 is not very stable. I'm not sure whether there's something wrong with my configuration, or whether this combination of reader and smartcard just are instable at 848k.

Fixed some data corruption bugs in libmrtd as well, and made both librfid and libmrtd use autoconf. There's still lots of cleanup work to be done, but basically one could now start to write a GUI application on top.