Merge pull request #44 from markus1189/master

Add customize group for restclient and add :group properties
Fixed ref to free var
Add examples

Adds the `examples/` folder and an example restclient file for httbin.org
Merge pull request #46 from markus1189/examples

Add examples
Convert escaped JSON unicode back into text. This is of no use with current json-reformat.el, so will work with either my own ex-bundled version of json-reformat.el, or if @gongo will accept my pull request.
Get rid of json-reformat.el, use built-in json-pretty-print of emacs 24.4