Merge pull request #60 from numerical/master

Quick URL selection in the urlselection overlay
document the quick_url configuration setting
make style consistent
check for non-digits isn't necessary

launch_url does this already
calculate the # of digits with log10 and free str
rm the comma-separated hint feature
make the quick_url behavior the only option
add improving the hint uniqueness check to TODO
check against visual_bell option
Merge pull request #61 from gtmanfred/master

vte_terminal_set_visible_bell should read visual_bell
smarter url hints, still needs to be refactored by putting unambiguous_url into a utility