[Paraview] ParaView using Homebrew for OsX

[Utkarsh Ayachit]

Folks,

As an experiment, homebrew build script for ParaView available at

https://github.com/utkarshayachit/paraview-homebrew

Haven't really tested it throughly or added options like building the
SDK (which I think will be very useful) etc.

Figured I'd put it out there, have people test it and then update it
as needed before contributing it to homebrew-science.

Utkarsh