Changes between 6.6.4 and 6.6.5

Module changes

• Fixed url module not cleaning punctuation when auto-titling [#1515]
• Fixed url module's punctuation-cleaning on Python 2 [#1517]
• Fixed .redditor command with newer praw versions (4.0+) [#1506]
• Reloading modules now runs their shutdown() routines [#1412]