Updated Node and npm versions
Updated dependencies (see below) and removed unneeded Karma plug-ins

Updated jake 0.7.2 --> 0.7.6
Updated jshint 2.1.11 --> 2.3.0
Updated karma 0.10.2 --> 0.10.8
Updated karma-mocha 0.1.0 --> 0.1.1
Updated mocha 1.13.0 --> 1.16.1
Updated nodeunit 0.8.1 --> 0.8.2