cpdb-backend-cups 2.0b1

First beta release for cpdb-backend-cups 2.0.0

• Added function to query for human readable names of options/choices
  With the added functionality of cpdb-libs to poll human-readable names for options/attributes and their choices this commit adds a simple function to provide human-readable strings for the user-settable printer IPP attributes of CUPS queues.
• Added support for common CUPS/cups-filters options
  Options like number-up, page-set, output-order, ... Available for all CUPS queues, not specific to particular printer.
• Added get_media_size() function
• Support for media sizes to have multiple margin variants (like standard and borderless)
• Do not send media-col attribute to frontend as user-settable option
• Adapted to renamed API functions and data types of cpdb-libs 2.x
• Updated signal names to match those emitted from CPDB frontend
• Made make dist generate a complete source tarball
• Fixed some potential crasher bugs following warnings about incompatible pointer types.
• Updated README.md
  • On update the old version of the backend needs to get killed
  • Common Print Dialog -> Common Print Dialog Backends
  • Requires cpdb-libs 2.0.0 or newer
  • Updated instructions for running the backend.
  • Added link to Gaurav Guleria's GSoC work, minor fixes
  • Use third person.