Update lib-re
Update libmwaw
Update LibreOffice
Undo some changes only appropriate for the clang fork
Add Nginx 1.7.7; RTMP module fails for some reason
Add a binary-distribution-based Liberation fonts package
nix-prefetch-git: run single-threaded 'git repack'

Without this, the generated pack files are non-deterministic.

I didn't notice this issue in my earlier testing, because my test repo
had too few commits for the thread scheduling to take effect. (Test repo
had about 10 commits.)
ocaml-lwt: fixes build with OCaml 3.12 and 4.02
Merge pull request #4812 from krgn/elm-repl

add elm-preprepl to package list
Merge pull request #4813 from bosu/fix-hscope

haskell: update to hscope 0.4.1
Merge pull request #4238 from wkennington/master.boost

Make boost 156 the default
Add mirrors for sage
haskell-cairo: re-generate version 0.12.5.3 with cabal2nix
haskell-ghc-mod: update to version 5.2.1.1
tinc_pre: Update to f57d53c
sxiv: update to 1.3-git and fix runtime behaviour

The fix involves using imlib2 built with giflib instead of a libungif.
Initially I split imlib2 into two but other distros seem to build imlib2
with giflib already and everything still builds with giflib version so I
migrated imlib2 to giflib all together.

Closes #4622
emacs24Packages.auctex: 11.87 -> 11.88
Merge pull request #4801 from robberer/pkgs/zabbix-server

zabbix-server: add extraConfig option
Merge pull request #4817 from joachifm/sage-mirrors

Add mirrors for sage
freefont_ttf: update from 20100919 to 20120503