New Search Metadata: LastHarvestDate, Method, Source

[xhqiao89]

kimschreuders[CodePlex]
Add these 3 additional metadata items (LastHarvestDate, Method, Source) to the search results. This will likely requirement modifications to the search catalog, the harvester, and the search web services. Method and Source likely may require several fields (i.e. Organization, SourceDescription, ContactName, Citation, etc) to appropriately describe.

[xhqiao89]

valentinedwv[CodePlex]
from issue 14:

i. Return the date when was the service last harvested ii. Return the date when the tagging was last updated