add libxmp 4.2.7
add xmp 4.0.7
haskellPackages.hedis: New expression
Merge pull request #2882 from iyzsong/n/xmp

add xmp, a extended module player
haskellPackages.snapletRedis: New expression

This needs to be jailbroken until a new version reaches Hackage.
nixos-generate-config: fix nix-env example command

An escape char is needed to prevent "$ nix" from being evaluated and
expanded to an empty string. With this change the resulting text is

  $ nix-env -qaP | grep wget

instead of

  -env -qaP | grep wget
libvirt: Update from 1.2.4 to 1.2.5
Fix dia when run not from $PATH