* version 4.0
  - added support for the new API

* version 2.7
  - fixed a cURL PHP 5.5 deprecation warning

* version 2.6
  - added setPageMargins()

* version 2.5
  - added setUserAgent()
  - added setProxy()  
  - added a version string variable: Pdfcrowd::$client_version
  - disabled global DNS cache
  - exception code is included in the error message
  - detection of get_magic_quotes_runtime()
  - improved error diagnostics

* version 2.4
  - added watermark support
  - added header/footer page numbering and exclusion methods

* version 2.3
  - added setTransparentBackground()

* version 2.2
  - prints user friendly message if cURL is not installed

* version 2.1
  - added setPageBackgroundColor()

* version 2.0
  - changed the defaults for setPdfScalingFactor() and setHtmlZoom()