ABI report for Glibmm, Pangomm and Cairomm

[Ponomarenko Andrey <andrewponomarenko yandex ru>]

Hello,

The Glibmm, Pangomm and Cairomm libraries have been added recently to the upstream ABI tracker project. The 
tracker performs backward binary compatibility analysis for the recent versions of libraries:

http://abi-laboratory.pro/tracker/timeline/glibmm/
http://abi-laboratory.pro/tracker/timeline/pangomm/
http://abi-laboratory.pro/tracker/timeline/cairomm/

The reports are generated daily with the help of the abi-compliance-checker and abi-tracker tools: 
https://github.com/lvc/abi-tracker

Hope this will help users, maintainers and developers of libraries to maintain backward compatibility.

Thank you.