Aded autoprefixer to package.json
Added test scaffold
Added autoprefixer transform
Added autoprefixer transform to buildProduction transform and binary
Merge branch 'autoprefixer'. Closes #64

* autoprefixer:
  Added autoprefixer transform to buildProduction transform and binary
  Added autoprefixer transform
  Added test scaffold
  Aded autoprefixer to package.json
Added Peter as a maintainer
Update assetgraph to v1.6.3
1.8.5