Improve cleaning of candidate names

[warwickmm]

In the Tickets class, we clean candidate names by replacing bad characters:

openelections-data-sd/scripts/tickets.py

Lines 34 to 44 in e0b7b0b

	BAD_CHARS = {
	'.': '',
	',': '',
	':': '',
	'"': '', # only for hanging quote marks
	'-': ' ',# since all quote sections cut first
	"'": ' ',
	'&': 'AND',
	'“': '',
	'”': ''
	}

This seems a bit aggressive, as it's not uncommon for names to contain ' and - (e.g., Shannon O'Brien, Cindy Hyde-Smith).