chore(travis): use saucelabs for chrome and firefox tests
chore(travis): fixed tunnel used by Karma on Saucelabs
Revert "feat(Scope): Instrument Scope to use User tags in Dart Obervatory"

This is only reverted because it is not ready for g3v1x.
We will re-apply this when we have the 'ok' to merge it into g3v1x.

This reverts commit c21ac7eaec3fd15bba7a124fdfb3e9680092a0f2.

Conflicts:
	lib/core/scope.dart
perf(view factory): 14% Precompute linking information for nodes

The Default TreeComponent benchmark dropped from 572ms to 501ms

Closes #1194
Closes #1196
chore(travis): increase max-duration to address sauce timeout on FF test
chore(docs): remove rm for old doc files. automating this is a bad idea.
fix(parser): ensure only one instance of dynamic parser
fix(examples): do not use shadow DOM

This is in preparation for implementing the Testability API and Protractor
end-to-end tests since chromedriver can't handle shadowDom references.
feat(animate): animationsAllowed property to turn off all animations

This is required for writing end-to-end tests against AngularDart apps
that use animations.  In such tests, you typically want to test the
functionality of the application and not necessarily deal with the
animations.  This allows you to turn off all animations in your
production site under test.

The Animate class has a new property, animationsAllowed, which can be
set to false to disable all animations.  When true (the default),
whether or not animations occur depend on the animation module installed
and the AnimationOptimizer.
feat(testability): implement the testability for ProtractorDart

See https://pub.dartlang.org/packages/protractor
fix(introspection): work around http://dartbug.com/17752
fix(introspection): work around additional bugs when working around dartbug 17752
test(e2e): add end-to-end tests using ProtractorDart

https://pub.dartlang.org/packages/protractor
chore(scripts): fix detection of DART_SDK/DART/DARTIUM

Sets the stage to get rid of obsolete DARTSDK.
chore(pubspec): require newer protractor
fix(e2e): support dart 1.6.0-dev.0.0
feat(testability): simpler API