Add support to CUPS-FILTERS for enabling conversion to and printing of PCLm files supported by IPP everywhere printers.

PCLm is a file format which is a light-weight subset of PDF which makes printing fast and efficient. It is streamable, i.e. can be printed page by page unlike PDFs, where PDF files require them to be loaded completely to the printer memory to be printed. Many cheap printers which are low on memory have this limitation of printing large PDF files, and here PCLm comes to the rescue. It also makes printing faster for high end printers. PCLm is also one of the standards for Wifi-Direct IPP printers. The project aims at enabling PCLm printing using cups and cups filters to PCLm supported printers.