Make overview page responsive. Small screens get a single col layout.
Create an absolute configPath... once.
Print a nice error message if the port is in use.
Remove path in CSS source map URL.

We create the map in the same location as the CSS file. For once no path is needed.
Move all dependencies to fixed versions and update some dependencies.

Updated:
- grunt 0.4.2 -> 0.4.4
- grunt-less-imports 0.9.0 -> 0.9.1
- grunt-contrib-jshint 0.8.0 -> 0.9.2
- grunt-contrib-uglify 0.2.7 -> 0.4.0
- grunt-contrib-jshint 0.5.3 -> 0.6.1

- lodash-node 2.4.0 -> 2.4.1