Squashed commit of the following:

commit 3c811bc0a867777d95c7cbe9b837a5130ce3b0f4
Author: Michael Stogowski <michael.stogowski@gamesys.co.uk>
Date:   Tue Dec 17 13:17:10 2013 +0000

    Ignoring *.iml files.

commit 1d49c08f2d32d6ac0ca386902622b46601af7930
Author: Michael Stogowski <michael.stogowski@gamesys.co.uk>
Date:   Tue Dec 17 13:13:43 2013 +0000

    Added option to exclude browsers from being detected by specifying --karma-detect-browsers-exclude=Chrome,Firefox command line argument.