Fix PIL import
Don't use replica set client when there is no replica.
Updated config.py.example. Now it actually works.
New setting: notify_on_recommandation. Closes #77.
Update redeye interface to support new setting
(notify_on_recommendation).
Refactor main help message
parser_redeye.py: `resolve` into cmdname as well
Generate help messages from option descriptions

Closes #56.