Update media.vimeo.js

I changed the addition of events to onReady as they were not being called. And in this way are called already.

In the method __paused__ ```this.lastState``` is always __undifined__, we must use ```this.vimeoInfo.state```.

The value of ```this.vimeoInfo.buffered``` is in percent, in the method ```bufferedPercent``` this value is divided by the __duration __ and returning us a wrong value. We must multiply this value with the duration... For me this is not the correct way to solve ... should do the override the method ```bufferedPercent```.