Hook up "?item", "item?" and "function([pause]" to help

[Doug Blank]

In IPython, you can use item? and ?item to get help on an item.

Also, if you type function([pause] it will show help on calling the function.

Currently, this is all hooked up, but doesn't actually relay any real help documentation.

[Doug Blank]

Will focus on this for 3.0.2.