`jc` does not limit results to subdirectories (via `match_fuzzy`)

Created by: blueyed

With jc foo in /home/daniel/.autojump, /tmp/t/C:\Users/foo was returned.

This appears to be caused by match_fuzzy, which uses only the last needle for fuzzy matching.

I see two problems here:

1. jc should trigger a mode, where entries are filtered based on the path prefix (pwd) explicitly, i.e. find results and apply a path based filter.
2. match_fuzzy should not work on the last needle only.

I could imagine looping over all needles in match_fuzzy.

This would change the documented behavior though, since Entry(path="/moo/foo/baz", weight=10), would not get matched anymore for needles=['foo', 'bar'].

I have started writing some tests for it, but would like to get some feedback before carrying on.