Add examples

[gregzanch]

Should add an examples tab so that people know what the possibilities are.

[gregzanch]

@jcbreton I can set up an examples menu/tab, we should start making test/example models to evaluate the solvers too

[jcbreton]

I have some example geometry that I've used for testing projects in the past that we can possibly use

[gregzanch]

that would be awesome; the src/res/models folder has a ton of crap in there that we could probably get rid of too.