[UNITYSDK-190] Removed XmlToHashtable cruft.
[UNITYSDK-126 fixup] Improved/fixed objectification of the appstore items.
[UNITYSDK-187] Metadata added
[UNITYSDK-191] Removed many unused Hashtables from Inventory callbacks.
[UNITYSDK-27] Changed IXML to System.XML
[fixup] Changes so that login widget uses ITasks rather than non-existant IActions