adding editTemplate and altTemplate to kendoListView

[Steve887]

editTemplate and altTemplate options added to kendoListView as per #233

[Steve887]

With further testing, this currently won't work at ko.memoization.unmemoizeDomNodeAndDescendants(element); is only called on the dataBound event and moving to edit mode doesn't trigger this event.

Fix is probably adding edit event to kendoListView to call unmemoize.