Include "config.h" at the beginning of all source code, remove it from headers.

While here distinguish licence comments using the /*- special comment delimiter.

src/lib/nfc.c

@@ -15,7 +15,6 @@
  *
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
  */
  
 /** 
@@ -23,6 +22,10 @@
  * @brief NFC library implementation
  */
 
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif // HAVE_CONFIG_H
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>
@@ -35,10 +38,6 @@
 
 #include <nfc/nfc-messages.h>
 
-#ifdef HAVE_CONFIG_H
-  #include "config.h"
-#endif // HAVE_CONFIG_H
-
 nfc_device_desc_t * nfc_pick_device (void);
 
 // PN53X configuration