invert the template test
The DandelionScanner learn to manage specific folder instead of only one (dandelion/)
Expose configured properties in 'Assets'
Improve 'Location Wrapper' feature for more complex usage.
Move 'Template' management to a specific 'Location Wrapper'
Add ServletName, Url and UrlPattern information on AssetsServlet

and use it in AssetsServlet3
Improve 'parameters' on assets request context

- it's no specific to template anymore
- change to a more generic name
- impact usage
Improve 'Specific Content Management' for 'Assets' Feature.

- add the wrapper to manage 'Delegate Content'