Added storage for custom element options
Added storage for custom element options

added $options property with appropriate getters and setters
to allow for adding of custom options to an element.

zendframework/zend-form,svycka/zend-form,adamlundrigan/zend-form,akrabat/zend-form,MadCat34/zend-form,MadCat34/zend-form,akrabat/zend-form,svycka/zend-form,adamlundrigan/zend-form,marek-saji/zend-form,zendframework/zend-form,marek-saji/zend-form