[Tracker] feature request: sort, recent files

[yelo_3 <yelo_3 yahoo it>]

Hello, it would be nice to have the possibility to sort results for:
- filename
- last edit
- last accessed
- (other nautilus columns such as owner or permissions)
- result match (based on exact partial/match and number of times the
word appears in the document)
- directory

maybe another great thing could be create another result type (such as
documents, text files, music) named "Recent Files" in which we search
into gnome's the recent files