Set planning committee and staff with disclosures as part of the data saved with front matter

This is consistent with the no disclosures lists, and allows teh lists to change over with time without hardcoding.
Rename the local variable since we're not editing a credit but a FrontMatter object
Merge pull request #36 from isaacgrant/cme-with-disclosures-in-the-db

Move planning committee and staff with disclosures into the dataobjects