Fixes the Travis CI config to the stable node releases and latest development.
Added before_install for Travis in order to display proper test output and run the lint task.
Travis CI should only report the master branch status.
Makes sure jslint is always installed.
Finished the *nix part of the file(1) update.
Added a cygwin based build for file 5.12
Added the cygwin dependency.
Fixes the broken file.exe build.
Updates the docs with the Windows info.
Updated the README.