logstash service improvements

* add logstash-contrib plugins package
* add additional options to the logstash service
fritzing: add version 0.9.0b

- An open source prototyping tool for Arduino-based projects
megaglest: new package
screen: enable 256 colors
Improve name quoting to correctly handle underscore
Update vanity counter. Now with GitHub username support
lua-packages.nix: whitespace fixes
Merge pull request #4502 from grwlf/screen-256color

screen: enable 256 colors
haskellPackages.cmdtheline: apply System.{Cmd -> Process} patch
Merge pull request #4501 from edwtjo/cmdtheline-patch

haskellPackages.cmdtheline: apply System.{Cmd -> Process} patch
Merge pull request #4475 from matejc/megaglest

megaglest: new package
Merge pull request #4456 from robberer/pkgs/fritzing

fritzing: add version 0.9.0b
Merge pull request #4392 from cstrahan/logstash

logstash service improvements
haskell-aeson: update to version 0.8.0.1
haskell-epic: update to version 0.9.3.2
haskell-Boolean: update to version 0.2.3
haskell-GLUtil: update to version 0.8.2
haskell-HaskellNet-SSL: update to version 0.2.5.1
haskell-HaskellNet: update to version 0.4
haskell-NumInstances: update to version 1.4