Pull requets: Introducing indicator metadata

also contains the sql inserts for populating with data from the Metadata spreadsheet: 
https://docs.google.com/spreadsheet/ccc?key=0AoSjej3U9V6fdHJzcWNreF8tVDNXTlpaeXl3Z3h3WWc&usp=drive_web&pli=1#gid=10