Allow configuration of push header sending

Remove versioning

Lighthouse screenshot

Support static version for prpl-server cmd

Syntax in readme was out-of-date

Reduce memory use

Avoid regexp when simple string suffix will suffice

Go 1.8 on AppEngine new fixed

Use go 1.6

Enable entrypoint to be transformed

Default template should be empty (for embedded)

Formatting

Make app.yaml template configurable. Closes #11

Add lighthouse results

Add cmd tool to generate the AppEngine app.yaml config file