Ability to auto initialize player from a tag and a shapshot URL w/o any custom javascript

Now, if user included all the required player-related scripts or just a bundle, and he knows a snapshot JSON URL, he is able to write:

`<div anm-player-target anm-snapshot-url="http://clips.animatron.com/0d8887993614c3b6d57535eca50fa014.json?width=200&height=200" anm-auto-play="true"></div>`

And it will actually work!