Fix Title Submitter string encoding (utf-8)

Fix for encoding issue I've seen on two separate occasions, seen today (10/10/13) with the article:

_Weary of ‘Fruit Fly’ Consumer Startups, Andreessen Horowitz Raises Series A Bar_
(https://news.ycombinator.com/item?id=6530536)

The left single quote was causing an error. A try/except could be used instead but encoding to utf-8 seems in-line with Python 3's shift to utf-8 as the default encoding.