Adding ocropus, based on an expression from iElectric.
Adding missing dependencies. There is still a matplotlib problem running ocropus-hocr.
Elm: fix build by ignoring the build instructions provided by upstream

Re-apply the build fix from <https://github.com/NixOS/nixpkgs/issues/2089>,
because apparently the underlying issue has not been fixed.

According to <https://github.com/elm-lang/Elm/issues/384>, Elm's release
archive comes with a Setup.hs that cannot compile an Elm release. Duh!
Replacing the custom Setup.hs file with a dummy version fixes this issue.
Elm: require binary 0.7.x on ghc <= 7.6.3
crrcsim: Update to 0.9.12 & simplify.
pythonPackages.gflags: update to 2.0
pythonPackages.iso8601_0_1_4: add package version 0.1.4 for gcutil
pythonPackages.ipaddr: update to 2.1.10
pythonPackages.google-apputils: add package
pythonPackages.gcutil: add package
better error message in case of missing uids
Manual: Note about using a local branch
Fixing upnp in syncthing
nautilus 3.12: find extensions
nautilus-sendto: new package

Integrates Evolution and Pidgin into the Nautilus file manager
gnome-terminal 3.12: enable nautilus extension
Merge pull request #2782 from soenkehahn/better_error_message_missing_uid

better error message in case of missing uids
maintainers.nix: add missing edeoryd46, fixing channel

Close #2783.
flightgear & simgear: Bump to 3.0.0.
Fix regression in fetchhg.