Observe rules 4 and 5 for conventions of wrapped document/literal

Fixed issue #14
Rule 4. Input Wrapper Element name should match with Operation name
Rule 5. <Output Wrapper Element Name> = <Operation Name> + "Response"
Provide a DocumentLiteralWrapper for use with wrapped document/literal

It will automatically wrap complex return values in an appropriate object
This is so the original class handler can have @return values that actually
match what is getting returned.

Usage:
$handler = new \WSDL\DocumentLiteralWrapper(new MyClassHandler());
$server->setObject($handler);

Assists issue #14
Add documentation for DocumentLiteralWrapped class
Merge branch 'master' into issue-14
Merge pull request #16 from rhelms/issue-14

Observe wrapped document/literal convention rules 4 and 5