Added landing pages for new samples

R=kathyw@google.com

Review URL: https://chromiumcodereview.appspot.com//35563005
Merge pull request #86 from mkustermann/master

Added new eclipse+editor HTTP redirects to google cloud storage for the new dev/stable channels
Add info for the --deploy flag for build.dart.

Staged at:

https://build-dot-dart-lang.appspot.com/tools/editor/build.html#flags

BUG=13859
R=keertip@google.com

Review URL: https://chromiumcodereview.appspot.com/49003002
Added geolocation (new); surfaced appcache and webaudio samples

R=kathyw@google.com

Review URL: https://chromiumcodereview.appspot.com//47213005
bump polymer.dart docs to 0.8.7

BUG=
R=jmesserly@google.com

Review URL: https://chromiumcodereview.appspot.com//46403005
adding notes about polymer compatibility

BUG=
R=kathyw@google.com, sethladd@google.com

Review URL: https://chromiumcodereview.appspot.com/40743002
update polymer related info to 0.8.7

BUG=
R=kathyw@google.com

Review URL: https://chromiumcodereview.appspot.com/51473002
remove community, redirect to support, clean up support

BUG=
R=kathyw@google.com

Review URL: https://chromiumcodereview.appspot.com//54813003
Merge pull request #87 from mkustermann/dartlang-gcslinks-to-channels

Redirect current users to new dev channel downloads + Changed links to stable channel on dartlang.org
Not ready yet.

Revert "Merge pull request #87 from mkustermann/dartlang-gcslinks-to-channels"

This reverts commit eb4b0d55364545bcf59f60764ccf28ce16379bc5, reversing
changes made to 8ad8288318c7ea2fc11a679bc4ee6b7472d6f9b8.
Update all links on dartlang.org to new google cloud storage buckets

Changes, apart from replacing links from the old buckets with links to
gs://dart-archive/, are:
 - replace integration links with links to stable channel
 - replace continuous links with links to dev channel