Initial Sony Smart Watch 2 (SW2) support

The changes in this PR allow notifications to be passed to a Sony Smartwatch 2 (SW2) as well as a Pebble.

Some notes:
* The code has copyright assigned to Dattas Moonchaser
* It requires the Sony Add-on SDK (http://developer.sonymobile.com/knowledge-base/sony-add-on-sdk/) to build
* Iconography is borrowed from the example Sony apps as my graphic art skills are lacking