osyo-manga/unite-filters-collection — pull request #1 by wonderful-panda (2014-09-11 09:06:35+00:00)
Title: matcher_file_name: ignore input which precedes slash

In `Unite file`, we can move to parent directory by inputting "../", but it does not work when `matcher_file_name` is applied.
This patch improve this behavior.
When inputted string contains `/`, take sub string after last `/` as a filter.