fix a partial match bug

we want exact matches for fields, or we might get matches on 'View
Status' when we really wanted just 'Status'. That's confusing.
add some helpful options to `show`

like, you might want to get a bunch of bugs at once:
bugger show 1234 1235 1236

and you might want to have just the blurb versions of those bugs:
bugger show -s 1234 1235 1236