Switch from IDs to URLs

[AurelioDeRosa]

As discussed today in the #joind.in channel on mIRC, the library will switch from IDs to URLs. So, to embed the profile of a user, instead of having an element like:

<div class="joindin-embed" data-id="25190" data-type="speaker"></div>

the library will support:

<div class="joindin-embed" data-url="https://api.joind.in/v2.1/users/25190" data-type="speaker"></div>

[AurelioDeRosa]

When this issue is solved, IDs will be deprecated.