card_bot: keep a db of processed comments
cards: updates from site
card_bot: print found cards
README: add praw.ini info
card_bot: printing entire card body on debug
card_bot: when we start, only work on new comments

Rather than getting all the last comments to process
card_bot: move some logs to debug
util: log to stream and file
renamed: util.py -> logging_util.py
card_bot: start responding to comments!
card_bot: 30 seconds between runs