add vobsub2srt-git-20131228-1c782e5
add mathematica-9.0.1
Build numpy against openblas
Don't set a default version of Mathematica

Nixpkgs should not set a default version of Mathematica. Many users of
Mathematica have institutional licenses and do not have immediate access
to new versions. If there is a default version in Nixpkgs, updating that
version will cause trouble for all such users.
zsh: don't clobber the environment of non-login shells
networkmanager: add opensresolv
NetworkManager: correct resolvconf executable name
openresolv: wrap resolvconf to set PATH
Merge branch 'vobsub2srt' into installed-next
Merge branch 'mathematica' into installed-next
Merge branch 'biber' into installed-next