- implemented fingerprinting
- removed RockPage.ResolveRockUrl(url, bool includeRoot) to make way for RockPage.ResolveRockUrl(url, bool fingerprint.  Added RockPage.ResolveRockUrlIncludeBase(url) to replace RockPage.ResolveRockUrl(url, bool includeRoot)
- GetImage now tells the browser to cache images for 365 days (if the image binaryfiletype is set to cachable)