Add eternity engine, a Doom port by James Haley

Eternity Engine is a limit removing port descended from BOOM
start dhcpcd after network-interfaces
pypyPackages.greenlet: disable
sproxy-web: mark as broken
pythonPackages.zope_testrunner: enable tests
pythonPackages.sure: use upstream package, next release should have tests
pypyPackages.fabric: disable tests
add more convenient adapter for making debug builds
help2man: update from 1.46.1 to 1.46.2
pypyPackages.pil: fix build
pypyPackages.numpy: disable and upgrade
pypyPackages.lxml: 3.0.2 -> 3.3.6 (fixes pypy build)
pypyPackages.psycopg2: disable
pypyPackages.pycurl: disable
ack: update from 2.12 to 2.14
blueman: update from 1.21 to 1.23
buildPythonPackage: support .override {}
pythonPackages.sqlalchemy{,8}: disable on py34
memtest86: update from 4.3.3 to 4.3.6
mysql55: update from 5.5.37 to 5.5.39, potentially fixes CVE-2014-2494, CVE-2014-4207, CVE-2014-4258, CVE-2014-4260