field_map corrections

corrected field_map for rec7 (datpre) and rec8 (datpost)
add subjectID for records without field_map

if record in data does not have attr 'field_map', will still go ahead and add 'subjectID' to each record in data.  Hopefully this works!

Also adds import of record classes 3-9 from 'database'.
field_map corrections Edit

corrected field_map for rec7 (datpre) and rec8 (datpost)
Merge branch 'master' into jackij

Conflicts:
	urls.py