Improve the Screenshots section

[asmeurer]

Right now it is pretty pathetic. See http://sympy.org/screenshots.html .

[rlamy]

I would say it's a bit silly for a library to emphasise screenshots. It would make more sense to have a "Features" page, like on http://www.sqlalchemy.org/

[asmeurer]

Well "Screenshots" is probably a bad word for it. Basically, it should be a page that shows some example sessions to show what can be done.

A features page would be good too. Maybe we could incorporate the two together, (i.e., list the features and also show examples of them).

[simsa-st]

If I can say my opinion, I would call it "Examples" instead of "Screenshots" (behind this word I imagine screenshot like picture) and I would put there more examples to show what can be done (just like you say).

[asmeurer]

I agree with that.

[lalitmohit]

Claim