nixos-install: fix -I flag
Fix compiled-in /bin/bash in foomatic filters

Foomatic filters contained a 64-char c string hardcoded to /bin/bash.
This caused some filters (at least pdftops) to fail.

I also had to increase the size of the string because nix paths are too
long.
squish cups patches all into one statement
Merge pull request #5390 from abbradar/nixos-isntall

nixos-install: fix -I flag
blender: Add OpenCOLLADA support
nixpkgs: remove redundant attribute `sip`

Because:

 1. It is a mere alias of `pythonPackages.sip`
 2. It is usually not needed since propagated by `pyqt4`
 3. It makes it easy to have a packages depend on two different versions
 of sip
ceph: 0.90 final
fix selenium python bindings
Add GHC 7.8.4 and create haskellPackages_ghc784 package set.
Merge pull request #5428 from bdimcheff/fix-cups-filter-bash

Fix compiled-in /bin/bash in foomatic filters