Release Notes: The ImageMagick dependency was removed. A example was added for the custom drawing functions. Gray scale and CMYK color spaces are now supported for PDF output. USPS-4CB and Plessey Code Bi-directional barcodes were added. Chinese compaction is now supported for QR-Code. The callback function interface was redesigned. A new modulo-36 check digit method was added for DPD barcodes.