yelp: Show icons in the application
youtubeDL: update from 2014.02.17 to 2014.02.19.1
Merge pull request #1786 from lethalman/icons

gnome-icon-theme-symbolic and yelp update
nc-indicators: re-generate with cabal2nix
haskell-bert: update to version 1.2.2.1
haskell-css-text: update to version 0.1.2.0.1
haskell-http-conduit: update to version 2.0.0.6
haskell-multiarg: update to version 0.24.0.2
haskell-shake: update to version 0.11.2
haskell-shakespeare-css: update to version 1.0.7.1
haskell-skein: update to version 1.0.9
haskell-cabal2nix: update to version 1.60
add gnome3.vino
gnome3: add some default core packages to be installed
pythonPackages: fix and upate graphite, carbon and whisper

Twisted needed downgrade for carbon to start
gnome3: typo
nixos-generate-config: Don't generate /var/lib/nfs/rpc_pipefs filesystem

It's automatically mounted if the system has support for NFS.
nixos-generate-config: Don't generate filesystem options

We don't want to hardcode configuration options that the current kernel chose
for us when mounting the filesystem, since the defaults can change in the
future.
Add a constant ‘nixpkgsVersion’

This makes it a bit easier to find out the current Nixpkgs version,
e.g.

  $ nix-instantiate --eval '<nixpkgs>' -A lib.nixpkgsVersion
  "14.02.35657.66f51a9"
Add a global variable ‘inNixShell’

This is primarily useful in Nix expressions that are also intended to
be used by nix-shell.  It allows saying things like:

  buildInputs = [ ... ] ++ (if inNixShell then [ emacs ] else [ ]);

This should not be used in Nixpkgs (since the question of what
constitutes a useful nix-shell environment is very subjective).