앵귤러쓸때 watcher 들을 꼭 정리하자~

angular.watcher.purge.js

var watchers = [];
watchers.push($scope.$watch("currentTab", function(newer, older) {
  $scope.routing = getRouting(newer);
}));
watchers.push($rootScope.$watch("SR.connected", function(connected) {
    if ( connected ) $scope.watchAskingPriceWithMarketPrice();
}, true));

$scope.$on("$destroy", function(){
  watchers.forEach(function(fn) { fn(); });
});