you can now set the style of a widget in the api using Qt style sheets

Ignore-this: ac94da91f08752147de6bcf69e5468fc

darcs-hash:20141220170012-c21fe-88322dcbbac8025ad54b4c4c9336b6bfcd16ca8b
updated the documentationn of the API to show the dropdown and the new set_style method

Ignore-this: eb817cb32cf43e5f005de00171332580

darcs-hash:20141220170549-c21fe-8e6ac4cf1d770a1dadf1caf6739ad8dfb18d681b