`.add()` and `.ready()` documentation.
`.add()` and `.ready()` documentation.

BBC-News/Imager.js,kendrick-k/Imager.js,drummerboof/Imager.js,Brunosky75/Imager,tolis-e/Imager.js,kendrick-k/Imager.js,drummerboof/Imager.js,hellopath/Imager.js,hellopath/Imager.js,icoee/Imager.js,Brunosky75/Imager,tolis-e/Imager.js,icoee/Imager.js