Gets the following per institution
 -  no of institution members
 -  no of views owned by the institution or its members
    and broken down into the 3 view types which already appear
    in site registration data (profile, portfolio, and dashboard)
 -  no of block instances owned by the institution or its members
    and broken down by block type (~32 block types)
 -  no of artefacts authored by institution members
    and broken down by artefact type (~53 artefact types)
 -  no of forum posts authored by institution members

Change-Id: I9f38f2f9179c365aa0c669013d98c67dcb7bc5bd
Signed-off-by: Hugh Davenport <hugh@catalyst.net.nz>