grab, wMD update, Img Tmbnail & open

* grab screenshot
* wMediaDetails update mode
* Binding ImageSource Path -
http://social.msdn.microsoft.com/Forums/en-AU/wpf/thread/f94cc770-8d86-4a9f-a5f9-2ee2ea146c1a,
http://stackoverflow.com/questions/3297660/adding-a-custom-namespace-to-xaml
* opening image -
http://stackoverflow.com/questions/6808029/open-jpg-in-windows-photo-viewer-from-c-sharp-app
[media now has appropirate file type]

pending:
* MTags needs to be implemented on wMediaDetail
* Open Media/View Media Details needs to be implemented - 50% Videos
pending
* Unsaved/Removed Media cleanup needs to be implemented

done
* Grab Image needs to be implmented
* Open Media/View Media Details needs to be implemented - 50% Images
initiated