adding context.sourceName property
Squashed commit of the following:

commit d2db0ad07e5b81309f368df7f64b802613abc48a
Merge: f088e2c a6058c2
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Tue Aug 13 11:09:50 2013 -0500

    Merge branch 'master' of github.com:MassRelevance/massrel-js into ben-media

    Conflicts:
    	massrel.min.js

commit f088e2c7e0e3a3535d66c55b0f1480c2c51bee79
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Tue Aug 6 17:47:06 2013 -0500

    rake

commit 41ca777596841180b16236ac02267923c8d6a98d
Author: Ben Robbins <ben.robbins@gmail.com>
Date:   Tue Aug 6 16:59:48 2013 -0500

    adding context.sourceName
Release 0.17.1