bump dependencies

grunt@0.4.1 -> grunt@0.4.5
lodash@2.2.1 -> lodash@2.4.1
async@0.2.9 -> async@0.9.0
phantomjs@1.9.2-2 -> phantomjs@1.9.7-15
cheerio@0.12.4 -> cheerio@0.17.0
grunt-contrib-jshint@0.7.0 -> grunt-contrib-jshint@0.10.0
grunt-contrib-nodeunit@0.2.2 -> grunt-contrib-nodeunit@0.4.1
grunt-contrib-watch@0.5.3 -> grunt-contrib-watch@0.6.1