change default response from null to ''
Use refactored element upgrade system from CustomElements
update submodules, freshen build
update event path tests
freshen platform and builds
path resolution should work better under ShadowDOMPolyfill.
freshen builds.
g-overlay firefox compatibility
modernize platform
Merge branch 'master' of https://github.com/toolkitchen/toolkit into observer
Merge pull request #113 from toolkitchen/observer

merge Observer branch
freshen platform and builds
modify test runner page title
freshen build and platform
freshen build and platform
freshen .platform
freshen platform
freshen platform
freshen platform and builds
freshen platform
freshen platform