Added theme based error pages.
Added theme based error pages.

DenverDev/.NET-Wrapper-for-CKAN-API,opencolorado/.NET-Wrapper-for-CKAN-API,opencolorado/.NET-Wrapper-for-CKAN-API,DenverDev/.NET-Wrapper-for-CKAN-API,opencolorado/.NET-Wrapper-for-CKAN-API