Fix moving uri tabs between processes.
Removed some of the duplicated data being passed between processes.
Changed data passed to use URI instead of simply file path.
Update spec to match new tab event data.
Removed debug code
Change uri event key name back to text/uri-list, to match proper mime-type.
Merge remote-tracking branch 'origin/master' into fix-drag-tab-pass-uri
use text/uri-list for non-linux, text/plain for linux
Merge pull request #72 from kaiserfro/fix-drag-tab-pass-uri

Fix drag tab passing URI's