Import Path Integrals demo.

From http://www.ibiblio.org/e-notes/webcl/mc/path.html
Port Path Integrals to WebKit-WebCL.

And all unnecessary information was removed.
Import Fluid Dynamics 2d Ink Droplet demo.

From: http://www.ibiblio.org/e-notes/webcl/fluid/droplet2buf.html
Port Fluid Dynamics 2d Ink Droplet to WebKit-WebCL.

All unnecessary information was removed.
wip

Signed-off-by: Andre Luiz Viana Loureiro <andre.vl@samsung.com>