Merge pull request #6 from shenyute/master

Add -p argument for specify search result under path
update README
gj, gj_util: move argument prefix_path from filter_until_select() to get_list() since it's a one-time operation.
gj, gj_util: rename gj_util.get_list() to find_matches().
Merge pull request #1 from fcamel/master

Pull your modification