Remove double requirements (pip3 doesn't like this)
Ensure index on Modified key

db.cves.ensureIndex( {Modified:1} )
CWE from 2.5 to 2.8
CPE: references support added

References href are now added if present in each respective CPE
Merge remote-tracking branch 'upstream/master'
fix broken index.py due to changes in db_whitelist.py