- fix curl examples where `http://` was missing.
- consistent passing HTTP method parameter (all examples now have -X ACTION at
the end or the url, GET is implicit)
- quote url when it contains `&` , instead of escaping
The README is getting rather large so split it into individual files.
The next step will be rendering these into HTML pages with a TOC so that
they are a bit more navigable.
What do people think of this?