Add collectd 5.4.0
haskell-hsemail: update to version 1.7.7
Fix peerDependency handling in buildNodePackage

Signed-off-by: Shea Levy <shea@shealevy.com>
dstat: enable color output

Give dstat access to the "curses" module in the Python standard library
so that it can color its output. This is similar to how other distros
package it (e.g. Fedora, Ubuntu).
haskell: export callPackage to be able to create packages outside haskell-packages.nix
Merge pull request #888 from aristidb/master

haskell: export callPackage to be able to create packages outside haskell-packages.nix
uncrustify: new package

Uncrustify is a source code beautifier for C, C++, C#, ObjectiveC, D,
Java, Pawn and VALA.

Homepage: http://uncrustify.sourceforge.net/
haskell-hspec-expectations: update to version 0.3.3
haskell-lens: update to version 3.9.0.3
haskell-monoid-extras: update to version 0.3.2.0
haskell-multiarg: update to version 0.22.0.0
haskell-tasty: update to version 0.3