Implement fuzzy string matching for main selection

[mfrancis95]

That way someone can enter "donkey" as a main and have it become "Donkey Kong", for example.

The fuzzywuzzy library will be good for this.

[zedoax]

Added to milestones for v2. Will use Fuzzy for recommendations if a main is not found through exact matching

[mfrancis95]

At the very least, before we get to the real fuzzy stuff, /main should ignore case.