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.
What happens if you leave off the trailing slash? What kind of error gets raised?

Could you presume that this slash isn't there, and add some code to add it later where needed (checking to be sure it isn't there) or at least raise an error if they forgot it?