Backup source of webHydLa (No. 4)

* Overview [#l7994977]
- webHydLa features:
-- syntax highlight for HydLa,
-- 3-dimensional visualization of trajectories.

* Screenshot[#l7994977]

* Usage [#va9389fd]
- Edit your program on the left frame.
- Simulate your program pushing "Run" button.

* URL [#mdcc96bd]
-- (2016/03/09) We are sorry, but currently simulation cannot be executed because of the license expiration of Mathematica. We will fix it ASAP.