Sky app in the simulator.

Symlink Material Design Icons into Dart packages in the out dir

Otherwise they won't be visible to the web server.

Remove outdated HACKING.md document

CONTRIBUTING.md has the current instructions.

Add sky_services pub package

This script was erroring out due to some missing renames.

This package contains the mojom.dart files we generate from the sky_engine
repository.

Move Material Design Icons to their own package

After this patch, we use pub to manage versioning and fetching the material
design icons.

Adds test case for drawAtlas in games

Fix sky/tools/gn --ios --simulator to set the correct target_cpu

Also fixed missing dependency from LocalDOMWindow.cpp on
mojo's navigation service.  Not sure why gn check missed that.

R=abarth@google.com

Add a dialog to the address book app to test scoped focus.

Add a sky_engine package to contain the dart:sky SDK extensions

Create a SkyShell.apk

Adds custom play button with texture to demo game

Fix sky/tools/gn to not crash

TBR=abarth@google.com

Remove scheduleBuild()

This CL introduces a SkyShell.apk that is separate from the SkyDemo.apk that we
upload to the store to show our demos.  The SkyShell.apk is just an empty shell
that can run Sky applications on Android.

Fix gn --ios --simulator to use the right out directory.

R=abarth@google.com

I've noticed an anti-pattern emerge where people call scheduleBuild()
when they think they've changed enough state that they should rebuild,
instead of just wrapping their changes in setState(). This leads to
them missing state changes, having extraneous scheduleBuild() calls,
and other similar bugs.

By removing scheduleBuild(), the only way to actually schedule a build
now is to call setState(), and hopefully that'll make it much clearer
that you're only supposed to do this when you change state.

Track global keys globally.

Add insertBefore test which I wrote from Hixie's fuzzer

Fix gn --ios --simulator

Previously --simulator required an argument due to not having
an action specified and defaulting to "store" instead of "store_true"

R=iansf@google.com

R=ianh@google.com

Add support for Canvas.setMatrix and getTotalMatrix

Part of fixing issue #138.

R=abarth@google.com

Assert that there are no duplicates.
Export GlobalKey from basic.dart, so that people don't have to import widgets.dart just for that.
Fix the "initialFocus" feature which actually didn't work.

iOS build is now closer to the Android and Linux builds.  Correctly builds the dart-pkg/packages files so that you don't have to build the Android build to run sky_server.

Android and Linux builds.

Also fixes a couple of toolchain selection issues.

Feedback from previous logging code review that I missed.