Move examples into separate repository

[JayFoxRox]

I think the example code should be moved elsewhere; similar as for the https://github.com/grame-cncm/faustlibraries.git submodule. CI systems could either download a zip for the latest files, or developers can synchronize a submodule if versioning is required.

It's shared by various projects, and it's not practical to synchronize it manually. For example, even on this organization, copies exist at least in:

• https://github.com/grame-cncm/faust/tree/master-dev/examples
• https://github.com/grame-cncm/faustide/tree/master/docs/examples
• https://github.com/grame-cncm/faustdoc/tree/master/docs/examples

(each with a different history and change dates)

Usually it's not just the samples that are duplicated. However, the examples are probably the most essential thing, as they serve as demo for almost any new software or user that interfaces with faust.