liquidfun 1.1.0 (new formula)

LiquidFun is a 2D rigid-body and fluid simulation C++ library for games
based upon Box2D.
It provides support for procedural animation of physical bodies to make
objects move and interact in realistic ways.
Can a test be added to do something more substantial than e.g. `--version` or `--help`? See `cmake.rb` for an example of an application formula with a good test and `tinyxml2.rb` for an example of a library formula with a good test. Thanks!