pub: latest SDK, bot, etc
Fix widget.dart to work with the latest web_ui library.
Specifically, query selectors need to use "[is=x-foo]" instead of "x-foo" and
components cannot be assumed to subclass UnknownElement.
easy updates - tests pass
Merge remote-tracking branch 'origin/pr/26'
fixed up the mirror code
flagging the version as dev: 0.2.5-dev
fixed mirror ref for latest SDK
tool: removing _assertKnownPath

this is better handled in hop now
updates for more recent sdk, packages
tweaks to build.dart
mirror crazy: API has changed. Need to fix this...
updates for latest web-ui
copy components
manual removal of rel="import"
v0.2.5
updates to 0.5.7 sdk

work-around for dartbug 10583
using packaged versions of dart.js and test_controller.js
wiring up DRT tests to hop
fixed output tweaking code

...really need to get that in dart
v0.2.6