linux_3_12: fix hash
pasystray: new package
pasystray: add meta attributes
ledger3: Update to 3.1

This commit also adds pkgs.ledger2 and pkgs.ledger3 plus a default
attribute pkgs.ledger pointing at ledger3.
openttd: Update to 1.4.4.
Merge pull request #4871 from exlevan/master

pasystray: new package
Fixed typo: home -> homepage
new maintainer: sjmackenzie
Merge pull request #4874 from sjmackenzie/new-maintainer

new maintainer: sjmackenzie
dwarf-fortress: Update to 40.15.
dwarf-fortress: delete old 34.11 package.
semi-colon in maintainers
Merge pull request #4875 from sjmackenzie/new-maintainer-fix

semi-colon in maintainers
Fix gnupgcompat1 which doesn't seem to work with gnupg version 2.1.