changed wrong default values according to a-curvedimage.js (#2361)
changed wrong default values according to a-curvedimage.js (#2361)

Default values taken from https://github.com/aframevr/aframe/blob/master/src/extras/primitives/primitives/a-curvedimage.js
jaxmolina/ar,googlecreativelab/aframe,mkungla/aframe,chenzlabs/aframe,jaxmolina/ar,wizgrav/aframe,darkwing/aframe,aframevr/aframe,ngokevin/aframe,chenzlabs/aframe,googlecreativelab/aframe,fernandojsg/aframe,weddingdj/aframe,ngokevin/aframe,mkungla/aframe,fernandojsg/aframe,weddingdj/aframe,dmarcos/aframe,wizgrav/aframe,RSpace/aframe,dmarcos/aframe,aframevr/aframe,RSpace/aframe,darkwing/aframe