Fix for #133 - inheritance support.
Merge pull request #296 from ankush-garg/errJsAttach

Fix for #133 - inheritance support.
Make sure callback is done asynchronously for a cached wsdl
Merge pull request #298 from raymondfeng/master

Make sure callback is done asynchronously for a cached wsdl
Issue
Requests that included compex types led to invalid request XML.

Fix
Pass namespace and xmlns when generating child node XML, otherwise generated XML nodes will have no values.
Add check if namespace string contains ":".
Merge branch 'complex-types' of https://github.com/SteelzZ/node-soap into complex-types