vim: supporting multiple sources:
- vim-nox: client-server implementation without X
- latest:  latest mercurial sources (still very stable)
- default: latest release

vim-plugins: Introduce an area to put vim plugins which are worth adding to nix
because they need more effort than just "unpacking". Document that
neoload: upgrade to 4.1.3
linux-3.0: upgrade to 3.0.80
linux-3.4: upgrade to 3.4.47
linux-3.9: upgrade to 3.9.4
SBCL update
ECL update
linux: Update to 3.2.46
fish: Add fish 2.0.0
audacity: minor update, prefer system-wide libs

- Using system-wide libs where we have them (except for portaudio, which
  I couldn't make work).
- Add the soxr library (now the preferred way of audio resampling).
libotr3: bump to 3.2.1
Package obfsproxy and pyptlib needed for TOR obfuscated bridges.
haskell-pipes: Add pipes 3.3.0
haskell-pipes: Add pipes-concurrency, pipes-parse and pipes-safe
Merge pull request #588 from ocharles/fish

fish: Add fish 2.0.0
Make the location of the tarballs cache configurable
Merge pull request #589 from ocharles/pipes

Add various libraries for the Haskell "pipes" ecosystem
iputils: Don't depend on both GNU TLS and OpenSSL
php: Get rid of unnecessary runtime dependencies like gettext
Adding mitmproxy