add travis badge, sweep readme
add travis badge, sweep readme

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