Added setting default encoding for query parser in zend index

I think this is the cause of some issues with certain characters in the Zend index.

http://stackoverflow.com/questions/4723135/invalid-characters-for-lucene-text-search
https://github.com/zendframework/ZendSearch/issues/9
These classes require $name and $driver parameters in their constructors. Add that and then call parent::__construct($name, $driver). Or you might be able to add this line to the getIndex() method in this class.