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
ome-xml: Remove ScreenRef

This generated code was removed from the model, and was
not deleted when the generated code was removed from git
since this wasn't being currently generated.  It is
unused and not part of the current model.
Merge pull request #569 from qidane/web-script

Web script for Schema 2013-06 release
Merge pull request #575 from rleigh-dundee/omexml-screenref

ome-xml: Remove ScreenRef