IMPORTANT: Previous usage of *Files will continue to compile
fine but misbehave since the interface is compatible.

The following functions have been renamed:

    ParseFiles => ParseGlob
    ParseFile => ParseFiles
    ParseSetFiles => ParseSetGlob
    ParseSetFile => ParseSetFiles
    ParseTemplateFiles => ParseTemplateGlob
    ParseTemplateFile => ParseTemplateFiles

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4867041