improved show does not compatify output

[jaakkor2]

#150 improved show, but now

using LibGEOS
ls = LineString([[cosd(a), sind(a)] for a in range(0, stop=360, length=1000)])

more than fills the screen. Compactified output of display would be preferable (similar to how rand(100,100) fills only one screen on REPL).

Also, note that ?show says

The representation used by show generally includes Julia-specific formatting and type information, and should be parseable Julia code when possible.

Therefore, I think readgeom("POLYGON ((0 0, 1 0, 0 1, 0 0))") style has merits for show. Output of display could be POLYGON ((0 0, 1 0, 0 1, 0 0)).