* fnctl: improve UX for howto's
* doc: go function howto
* fnctl: show the progress of build calls
* doc: php function howto
* doc: fix Go HOWTO
* doc: Node Functions HOWTO
* doc: Python Functions HOWTO
* doc: improve README files
* doc: ccirello -> USERNAME
* docs: fix Python example
Used an idiomatic method (isatty) to decide whether stdin must
be read or not.
* doc: fix go example
* fnctl: fix docker push output
