Create LICENSE
Added new version info and changes
Clarified license & improved option comments
Removed reference to createinvoices.php

And added the correct bp_options.php and bp_lib.php file sections.
Updated with more helpful error messages

Added constant value for version numbering, added null/missing value checks in critical functions, clarified MIT license terms, improved cURL error response handling and added more cURL error information to assist with debugging, fixed bug in bpLog() that threw spurious Warnings for non-string values passed to the function
Added missing param for curl_errno()

And fixed syntax bug in bpJSONdecode()
Merge pull request #20 from ionux/master

Updated with more helpful error messages