ZF-11101: Remove the reference to Gdata_EventEntry's Hidden attribute

Description

Zend_Gdata_EventEntry does not provide hidden attribute and it should be removed from the documentation.

Comments

I have checked this against the Google Calendar API reference for the Event kind (http://code.google.com/apis/gdata/…), and there is no hidden attribute. The closest thing is "visibility", which is already implemented in Zend_Gdata_Kind_EventEntry and is already referenced in the same attribute list on the documentation page for this component.

Attached is a patch which removes mention of "Hidden" attribute on events from the documentation for Zend_Gdata_Calendar (specifically, this section: http://framework.zend.com/manual/en/…)

Fix in trunk r23879

Hello, Adam, I will push [solve] button instead of You. And I have marged to 1.11 branch for next mini release.

Thanks!