Don't use gettext macros
Add debian packaging files
Also distribute spec file
Use github address in ChangeLog
Set version to 2.90
Update debian packaging files
Rename debian/changelog.in to debian/changelog.template.in to avoid overwriting debian/changelog when building package
Define SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE if undefined
Move all packaging related files to a subfolder