vagrant: add expression
ntopng: new package

ntopng is a high-speed web-based traffic analysis and flow collection
tool. ntopng => ntop next generation.

http://www.ntop.org/products/ntop/
nixos: add ntopng service

ntopng is a high-speed web-based traffic analysis and flow collection
tool. Enable it by adding this to configuration.nix:

  services.ntopng.enable = true;

Open a browser at http://localhost:3000 and login with the default
username/password: admin/admin.
renpy: update to 6.16.3
Add shellinabox
add ranger 1.6.1
Correct web-skip value to match behavior of checkip.dyndns.com
enabled introspection for clutter,cogl and json-glib
Firefox 26.0.  (Doesn't build.)
firefox: Hack to get it to compile.
dhcpcd: make dhcpcd work in linux containers
memcached: set uid to make it work with #1076
tmpwatch: Add package.
photivo: Add photivo photo processor / RAW development laboratory.
perl-DBD-mysql: Update to 4.023 (.013 fails to build).
stepmania: A dance (rhythm) game in the spirit of DDR.
lcov: Update to 1.10 as 1.9 fails with gcc 4.7 .gcno files.
youtubeDL: update from 2013.12.08.1 to 2013.12.11.2
cppunit: update from 1.12.0 to 1.12.1
yajl: update from 2.0.1 to 2.0.4