Bump version for release v0.0.20131010

bump version for release

polymer-element supports new requirements for type extension custom e…

…lements

bump version for release

tweak doc generation settings

Merge pull request Polymer#241 from Polymer/master

8/15 master -> stable

Merge pull request Polymer#241 from Polymer/master

8/15 master -> stable

Merge pull request Polymer#231 from Polymer/master

8/8 master -> stable

Merge pull request Polymer#223 from Polymer/master

8/1 master -> stable

Merge pull request Polymer#204 from Polymer/master

7/11 master -> stable