Added current url to obscura exception logging
Updated exception logging in AjaxManager()
Modified EntityCollection constructor to take an Entity object rather than an entityid
Added EntityCollection(EntityType) consctructor
Fixed null reference bugs in EntityCollection
Added static Entity*.All() methods to retrieve all entities
Fixed bug where incorrect Image height/width were being pulled from exif data. Now pulling height/witdh from image file itself.
Added dimenstions to Image.ToXml()
Fixed warnings
Updated *.Update() methods to taken in base Entity parameters
Screwed up last commit. Fixed internal accessors update bugs in all entity descendants