hide linked list: dart:collections now have a LinkedList.

R=jmesserly@google.com

Review URL: https://chromiumcodereview.appspot.com//17230005
publish 0.4.12 - breaking changes for 0.5.20
fix rendertest: we moved smart string matcher to unittest

Review URL: https://chromiumcodereview.appspot.com//17332002
fix #540 - update the sourcemap url

R=gram@google.com

Review URL: https://chromiumcodereview.appspot.com//17315014
bump spec
More information for the editor: print generated contents from build.dart

R=gram@google.com

Review URL: https://chromiumcodereview.appspot.com//17552013
v0.4.12+2
Remove mangling and add CSS reset file option

BUG=
R=sigmund@google.com

Review URL: https://chromiumcodereview.appspot.com//17328002
v0.4.12+3

BUG=

Review URL: https://chromiumcodereview.appspot.com//17716003
Fix also optional arguments in observable transform.

R=jmesserly@google.com

Review URL: https://chromiumcodereview.appspot.com//17768004
Re-organized the tests

BUG=
R=sigmund@google.com

Review URL: https://chromiumcodereview.appspot.com//17772002
Ensure that mangling is exactly as before

BUG=
R=sigmund@google.com

Review URL: https://chromiumcodereview.appspot.com//18067002
Bumped to version 0.4.13

BUG=

Review URL: https://chromiumcodereview.appspot.com//18098002
Test cases for @apply polyfill and shadowDOM

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R=sigmund@google.com

Review URL: https://chromiumcodereview.appspot.com//18092002
v0.4.13+1

BUG=

Review URL: https://chromiumcodereview.appspot.com//18184010
workaround for dart2js bug 11540

R=dgrove@google.com

Review URL: https://chromiumcodereview.appspot.com//18063012
Update pubspec.yaml
WIKI example to work with CSS scoping doc

BUG=
R=sigmund@google.com

Review URL: https://chromiumcodereview.appspot.com//18362004
Added blank line

BUG=

Review URL: https://chromiumcodereview.appspot.com//18559006
[merge] merging master