change locate to use relglobs by default
This makes its default behaviour useful again (issue108), and
changes it search the entire repository by default (instead
of just the cwd), just like all other commands.
It also hides issue204 by default, but you'll still see the
same behaviour if you give it a relpath: pattern.
adding dir/bar
adding foo
dir/bar
foo
adding dir/bar_2
adding foo_2
dir/bar_2
foo_2
adding a
adding c
adding b
adding d
removing a
removing c
recording removal of a as rename to b (100% similar)