lib/Base.js
function(other, evname, callback) {
    other.on(evname, callback, this);
    var a = this._listeningTo = this._listeningTo || {},
      b = a[other._cid] = other;
  }
function(other, evname, callback) {
    other.on(evname, callback, this);
    var a = this._listeningTo = this._listeningTo || {},
      b = a[other._cid] = other;
  }
function ( other , evname , callback ) { other . on ( evname , callback , this ) ; var a = this . _listeningTo = this . _listeningTo || { } , b = a [ other . _cid ] = other ; }
Bind event listener on an other object

@param {object} object to listen to
@param {string} name of event
@param {function} callback
@return {this}
Bind event listener on an other object