Add some example LambdaDesigner code

[jarmitage]

Something people can run themselves and edit to get familiar with the DSL

[ulyssesdotcodes]

Added a reference to https://github.com/ulyssesp/oscillare/blob/master/src/Visuals.hs with e5d5512, but keeping up to add more examples in the README or wiki itself.

[ulyssesdotcodes]

https://github.com/ulyssesp/lambdadesigner-experiments

This will serve as a base for some more involved self-contained examples.