port etag etc changes from bundler-api to artifice
port etag etc changes from bundler-api to artifice

asutoshpalai/bundler,RochesterinNYC/bundler,bronzdoc/bundler,bronzdoc/bundler,RochesterinNYC/bundler,seanlinsley/bundler,mvz/bundler,seanlinsley/bundler,mvz/bundler,dilumnavanjana/bundler,asutoshpalai/bundler,bundler/bundler,bundler/bundler,dilumnavanjana/bundler