add +1 -1 button

front/views/cut.html

@@ -59,8 +59,10 @@
 				</div>
 			</div>
 
+			<button ng-click="changeTime(-60)" class="btn btn-default">-1m</button>
 			<button ng-click="changeTime(-10)" class="btn btn-default">-10s</button>
 			<button ng-click="changeTime(10)" class="btn btn-default">+10s</button>
+			<button ng-click="changeTime(60)" class="btn btn-default">+1m</button>
 
 			<button ng-click="setStart()" class="btn btn-default">Inicio</button>
 			<button ng-click="setEnd()" class="btn btn-default">Fin</button>