Add event tracking to PiWik plugin
Update dist folder
Merge pull request #164 from timelf123/upstream/master

cut 0.15.20 release and add changelog
Add Google Tag Manager instructions to README
Fix module used in GTM
Merge pull request #166 from kraihn/master

Thanks!
Merge pull request #152 from postalservice14/piwik_event_tracking

Add event tracking for PIWIK plugin
merge from rallysoftware
Merge branch 'RallySoftware-master'
Merge remote-tracking branch 'upstream/master'