ZF-3458: Documented non-existing methods in Zend_Form-Elements docs.

Description

There are documented non-existing methods in Zend_Form-Elements docs:

Zend_Form_Element::addAttribs();
Zend_Form_Element::removeAttrib();
Zend_Form_Element::clearAttribs();

Lines 985, 1005 and 1010.

Comments

Fixed in trunk and 1.6 release branch.

Updating for the 1.6.0 release.