Fixing small typos in schema docs
Adding web-extra folder copy to script

The content of any "web-extra" folder will be applied by an
rsync to the publish folder after it is build. I needed this
to test pre-release versions of the schema as they need added
to the website but not included in the generated indexes.
Updating docs link
Merge pull request #569 from qidane/web-script

Web script for Schema 2013-06 release