Bump the amount of memory for the installer test

It randomly OOMs.

http://hydra.nixos.org/build/13587153
pythonPackges.ipython: 2.0.0 -> 2.2.0
pythonPackages.matplotlib: don't depend on pygtk
IDEA: 13.1.3 -> 13.1.4

Changed, attribute name separator changed to dashes and decription.
Added longDescription.
pythonPackages.jsonschema: 2.0.0 -> 2.4.0
pythonPackages.memcached: 1.48 -> 1.51
pythonPackages.sqlalchemy{8,9}: bump
Merge pull request #3778 from edwtjo/idea-13.1.4

IDEA: 13.1.3 -> 13.1.4
Moo: Fix build

http://hydra.nixos.org/build/13626782
haskell-MonadRandom: update to version 0.2.0.1
haskell-HTTP: update to version 4000.2.18
haskell-arbtt: update to version 0.8.1.2
haskell-http-client: update to version 0.3.7.2
haskell-language-c: update to version 0.4.6
haskell-stylish-haskell: update to version 0.5.10.2
haskell-yesod-core: update to version 1.2.19.1
network-uri: build with a recent version of Cabal on GHC 6.x
Build cabal-install-0.14.0 with network 2.3.x on GHC 7.4.2 and below.

Fixes <https://github.com/NixOS/nixpkgs/pull/3770>.