smtube and smplayer PPA

This PPA brings in the recent version 17.2.0-1 of smplayer for dCore-trusty, dCore-xenial, and dCore-yakkety.  As well as latest version 17.1.0 of smtube for those dCore ports as well.  Add this repo to import from with the below command:

sce-ppa-add p...