Issue 38 Create Angular Service to talk to Google Geocode API

Fixes #38

Example on how to use
```js
var IndexController = [
        '$scope', 'Geocoder',
        function ($scope, Geocoder) {
            $scope.geocoder = Geocoder;

            var getLocation = function () {
                Geocoder.latLngForAddress("123 ABC Lane, Wichita, KS 123456").then(function(location) {
                    console.log(location);
                });
            };
        }
    ];
```