ZF-1893: Make Zend_Controller_Router_Rewrite support method chaining


Make the addRoute, addRoutes, addConfig, removeRoute, removeDefaultRoutes methods of Zend_Controller_Router_Rewrite return $this, to support method chaning.


Assign to Matthew.

Assigning to Martel

Support for method chaining added to trunk. Thanks.

Fixes 1.1.0 but not also 1.0.2 until changes are merged to release-1.0 branch