Fix images on home, search & cateogry pages: 27444
* Generated new filter vnProductImageFilter
* Implement code for image url parsing
* Added vnProductImageFilter documentation
* Fixed existing documentation for unrelated tools
* Future optimization / noted issue:
* - The view calls the filter function multiple time (this is not ideal)
* - Turn the image into a directive with its own controller
* - Set the image src in the directives controller (all images will get their own controller)
* - Only call the filter if the image path is not already set
Change filter to return empty string for no match.