feat(element binder): Two way binding for Web Components

Closes #1282
chore(presubmit): Do not use the g3v1x task for presubmit

Closes #1214
chore(release): v0.13.0

(see the v0.13.0 tag for the exact history of this version)
fix(web components): Support Polymer quirks

Closes #1292
chore(travis): cleanup the configuration
chore(travis): run test on IE and Safari
refactor(Http): code cleanup
fix(ShadowDomComponentFactory): Make Windows & Linux platforms produce the same response

The "\n" would be stripped on windows platforms resulting in responses
having a different content.