Building toward a functional Composer package
Require php 5.2+
Adding composer installation instructions
Merge pull request #42 from titusfoo/master

More error checking & indent corrections
Format update.

Formatting update only.  Adding proper phpDocs and indentation of major
block.
Refactoring new exception handling code

Make the new JSON error checking API slightly more unobtrusive.  Also
reformatting code.
Reformatting code
Adding headers options to GET

Adding the ability to send HTTP headers on GET and DELETE requests.
This change is local just to those methods and does not provide a way
to set headers across all requests at the moment.  I'm open to
discussing a global header approach but for now I wanted to keep it
simple.

closes #38, closes #25, closes #19
Corrected Decoding exception and added errno (handy with unknown error)