Please add support for retrieving keys

[repalogic]

The current implementation only supports to retrieve values in getAll, each, etc. Please also add methods to retrieve the keys in combination with the values as the keys are necessary for example for deletion, e.g.:

ObjectStore.prototype.getAllKeyValues = function() {
   var defer;
   defer = this.defer();
    if (this.store.getAll) {
       defer.resolveWith(this.store.getAll());
    } else {
       this._mapCursor(defer, function(cursor) {
         return {key:cursor.key, value:cursor.value};
        });
    }
     return defer.promise;
};

Just provide a map with "key" and "value" attributes.

Mathias

[bramski]

Open a pull request if you would like this functionality.