Show more info about unlockables in research screen

[MatthewCline]

If you click on one of the icons in the research screen it should tell you more info about that thing, so that players who have never unlocked that thing before can do some planning without having to look at the wiki.  Information should include at least the dimensions of the thing and what it's made from, and probably also the requirements and outputs.

Some examples:

1) In the game where I first unlocked art I had made plans on where I'd put statues and paintings, but they didn't fit in a lot of the spaces I'd left empty because I didn't realize that statues were three blocks high and that paintings were two blocks wide.

2)  I'd have been pretty pissed off if I'd researched trap making only to find out that they're made of plastic but I had neither researched plastic nor had the resources to make plastic.