Added all vendor scripts to bower.json

This enables automatic dependency injections via wiredep and similar tools.
Merge pull request #158 from Gabro/patch-1

Added all vendor scripts to bower.json
Fixes issue #161 with the kissmetrics plugin where the $window provider was relied upon but not available.  Usage of the global 'window' object in the kissmetrics plugin now matches the other included plugins.
Merge pull request #163 from rbdone/master

Fixes issue #161 by changing kissmetrics plugin to use global window object
cut 0.15.20 release and add changelog
Merge pull request #164 from timelf123/upstream/master

cut 0.15.20 release and add changelog