--no-color option to disable Logger's output coloring

Useful when storing logs in plain files. Currently, with coloring enabled, the output is rather messy:

  [34m��� [39m  [34mFlight [39m  [35m1/1 [39m  [34mlaunched... [39m

Coloring stays enabled by default.
The parameter name is in pair with similiar options for NPM, Grunt, Bower etc.