document cspan ID in the README
opensecrets IDs for new Members of Congress and some historical Members via Wikipedia (I checked the IDs for the current Members but not the historical ones)
corrected votesmart/cspan IDs from Wikipedia
new votesmart/cspan IDs from Wikipedia
add wikipedia page names to the ID field, by scanning for pages using the CongBio and CongLinks templates and keying off of bioguide IDs