Now using the jansi library to preserve the color generated by karma's messages
Implementation changed due to issues under windows 7.
Addition of extra reset to handle cases where karma would fail during its execution
* more reliable colors reset implemented

* addition of the colors attribute to the plugin allowing to override the one present in the karma configuration file.
Usage examples: mvn test -Dcolors=false
                              mvn test -Dcolors=true
Merge pull request #11 from fbengrid/master

Console color coded message from karma