update/add examples and tests

add paper-dialog-base and cherrypick https://github.com/Polymer/paper-shadow/pull/25 for setZ method on paper-shadow

update config with a few new elements and rerun

remove webcomponentsjs

bower update and generate wrappers

BUG= https://github.com/dart-lang/paper-elements/issues/64
R=sigmund@google.com

Review URL: https://codereview.chromium.org//774143004
add .status file
update codereview.settings
add  and  to
Merge pull request #67 from dart-lang/input-value

add `value` and `committedValue` to paper-input
regen with new apigen
Merge pull request #71 from dart-lang/regen

regen with new apigen
move examples to new repo
Merge pull request #73 from dart-lang/no-examples

move examples to new repo
delete demo sources
Merge pull request #74 from dart-lang/delete-demos

delete demo sources
not-inlining the style was causing a web_components error, need to investigate
Merge pull request #76 from dart-lang/tests

not-inlining the style was causing a web_components error, need to inves...
fix flaky test
be a bit more lenient with rounding
increase core-elements upper bound
make the IE tests less flaky
mark paper_dropdown test as flaky in dartium
mark build version of paper_dropdown as flaky as well