API Update

Howdy, I see that the API was slightly changed (id_number to _id), is there any changelog? Would be helpful when updating libraries. Also, why were the WEBM and MP4 representations removed?

@Nuke928  
Currently the JSON responses in the API reflect more of our own internal workings than anything else; I do plan to fix this eventually with a unified, well documented, unchanging API v3 but that will take Time(tm).
 
I don’t know why webm/mp4 were removed. They shouldn’t have been.

@byte[]  
I understand, only does this screw up some of the libraries that utilize the API ><