Fix serving go files (referenced by source maps)
Fix serving go files (referenced by source maps)

bpowers/gopherjs,jargv/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,bpowers/gopherjs,gopherjs/gopherjs,bpowers/gopherjs,jargv/gopherjs,albrow/gopherjs,gopherjs/gopherjs,albrow/gopherjs,gopherjs/gopherjs,albrow/gopherjs,jargv/gopherjs