- Add driver agnostic nfc_pick_device(), nfc_list_devices();
- New API function: nfc_list_devices();
- PCSC Context sharing for acr122 driver;
- List all devices in nfc-list(1);
- Various code fixes and cleanup;
- Remove warnings when compiling;
- Merge r191:199 from trunk \_°< Coin!
- acr122: add acr122_pick_device(), acr122_list_devices();
- Add device name to device descriptions (nfc_device_desc_t) to select a given PCSC device;
- Use constants for driver names;
- Various code cleanups and enhancements.
