update README to reflect command changes, more complete examples
update README to reflect command changes, more complete examples

chenzlabs/aframe,msimpson/aframe,weddingdj/aframe,googlecreativelab/aframe,msimpson/aframe,dmarcos/aframe,dmarcos/aframe,jaxmolina/ar,mkungla/aframe,jzitelli/aframe,jzitelli/aframe,aframevr/aframe-core,aframevr/aframe-core,MatthewShotton/aframe,ngokevin/aframe,darkwing/aframe,fernandojsg/aframe,jaxmolina/ar,wizgrav/aframe,darkwing/aframe,fernandojsg/aframe,wizgrav/aframe,mkungla/aframe,weddingdj/aframe,googlecreativelab/aframe,chenzlabs/aframe,MatthewShotton/aframe,RSpace/aframe,aframevr/aframe,RSpace/aframe,ngokevin/aframe,aframevr/aframe