use_ok tasks

I've cut three tasks related to the use_ok() discussion, should people be
interested in doing some small work to that end.

Revert use_ok() back to its 0.98 features
https://github.com/schwern/test-more/issues/287

Discourage use_ok() in the docs
https://github.com/schwern/test-more/issues/288

Add test_history() to Test::More to access the History object
(this makes it much easier to bail on fail)
https://github.com/schwern/test-more/issues/286


-- 
191. Our Humvees cannot be assembled into a giant battle-robot.
    -- The 213 Things Skippy Is No Longer Allowed To Do In The U.S. Army
           http://skippyslist.com/list/

• use_ok tasks by Michael G Schwern