Squashed commit of the following:

commit a06c3b54ab7f4d2dfd49570aad44ba063409c325
Author: Baptiste Millou <baptiste@smoothie-creative.com>
Date:   Wed Dec 18 13:59:18 2013 -0500

    Fix incorrect settings loading.

    Signed-off-by: Baptiste Millou <baptiste@smoothie-creative.com>

commit 76330cdb5ef8dfdf9839c85e4fd220208f953386
Author: Baptiste Millou <baptiste@smoothie-creative.com>
Date:   Tue Dec 17 18:30:04 2013 -0500

    Correct plugin to work with ST3.

    Replace requests library with standard libraries.

    Signed-off-by: Baptiste Millou <baptiste@smoothie-creative.com>

Signed-off-by: Thierry Le Moulec <thierry@smoothie-creative.com>
Update readme
use system-wide proxy for querying the API endpoint