Zend_Locale:  - added isFixedDate()
Zend_Locale:
 - added isFixedDate()

Checks if the input is a string also trying to fix it.
Accepts wider variants of input dates than isDate()

git-svn-id: b6e219894c353fb1d215c78b2075057d8daadfba@3335 44c647ce-9c0f-0410-b52a-842ac1e357ba

tjohns/zf,svn2github/zend_framework,jupeter/zf1,svn2github/zend_framework,jupeter/zf1,tjohns/zf,svn2github/zend_framework,svn2github/zend_framework,jupeter/zf1,tjohns/zf,svn2github/zend_framework