Major change with multiple features

* Virtual Directory Support
* section unlock and lock support
* fixed issue with :add on pool provider not running all config
* fixed issue with :config on all providers causing application pool recycles (every chef-client run)
* moved to better method for XML checking of previous settings to detect changes

I apologize for the large pull request but the speed of approvals is taking too long and we have had to write too much code.
It'd be nice to expand on "name attribute" a little here since your examples below don't include this attribute and rely on that functionality. Something like "The name of the existing application to add the vdir to. This defaults to the name of the resource if not specified."