Issue #13: F-Spot does not compile under Mageia 4

Resolved the "Mono.Cairo 4.0.0.0" issues by making an explicit Cairo 4.0.0.0 version reference in the csproj that use it (rather than unversioned which was causing Mono.Cairo 2.12.0.0 to be automatically imported), and updated the Hyena patch so that it also includes the same changes.

This fixes Issue #13