Merge recent master
ghc-head: update to version 7.9.20140608
haskell-defaults.nix: ghc-HEAD requires latest mtl
haskell-syb: update to version 0.4.2
haskell-syb: drop obsolete versions 0.2.2 and 0.3.6.2
tbb: upgrade to 4.2-u5

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Add HHVM packages, replacing old hiphop-php expr

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Remove old hiphop-vm package

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Remove old intel-tbb package

It's unused now, and there's already the `tbb` package so this is
totally redundant.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
verifast: 14.5, x86_64 linux only

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Add Rakudo Star (closes #2054)

Signed-off-by: Austin Seipp <aseipp@pobox.com>
Merge pull request #2886 from madjar/master

davmail: update to 4.5.0
Merge pull request #2885 from wmertens/pgadmin-1.18.1

pgadmin: bump to 1.18.1
Merge pull request #2855 from cstrahan/xpwn-fix-darwin

Fix xpwn on Darwin and other case-insensitive file systems
systemd service: fix issues with escaping when unit name contains '-'

systemd escaping rules translate this into a string containing '\'
which is treated by some code paths as quoted, and by others as unquoted
causing the affected units to fail.
libtasn1: 3.4 -> 3.6. Fixes some security CVEs.

Closes #2844, #2857
mesa: maintenance update 10.1.4 -> .5
dbus: security-only update, CVE-2014-3477 (DOS)
mesa: fix libGL searching for libudev

Close #2784, #2731.

I don't have a clue if using our libudev is always correct on non-nixos,
or if using /run/current-system/sw/lib/libudev would be better...
Create a PIL symlink when installing PIL so the recommended way of importing PIL.something works