Add TeX styling to the transformations list

Summary:
Adds TeX () and <> to the transformations list when the transformer is
in exploration mode.

Test plan:
Visit test.html and try all the transformations
Make sure the printed output looks good and doesn't have any [Object
object]s or silly things :)

Auditors: alex
Transformer: Fix batman sign points

Summary:
graphie.addMovableLineSegment is evil, and this is a quick hack to fight
that evil at the scene of the crime rather than addressing its
deep-seated childhood psychological issues (yet).

Test Plan:
Reflect the polygon, then translate the polygon.
Verify that the points of the polygon are perfect circles, not batman
signs.

Auditors: alex