Added license headers

cmd/rlpdump/main.go

@@ -14,6 +14,10 @@
 	You should have received a copy of the GNU General Public License
 	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
 */
+/**
+ * @authors
+ * 	Felix Lange <felix@ethdev.com>
+ */
 
 // rlpdump is a pretty-printer for RLP data.
 package main