added debian folder for package building
Merge branch 'master' of github.com:apngasm/apngasm
Merge branch 'master' of github.com:apngasm/apngasm
Merge branch 'master' of github.com:apngasm/apngasm
Merge branch 'master' of github.com:apngasm/apngasm
deb split build WIP [broken]
Merge branch 'master' of github.com:apngasm/apngasm
add backers