Update FAQ to include "clickable" snippets of code for the platforms we support

It will be nice if our FAQ have the ability to display snippets of code for the various platforms we support. Currently we give a high level overview of the concept (e.g. What is a pipe?) and then we display a javascript example.

There, we can add a clickable "Android Version" and "iOS Version" and reveal the appropriate code for the platform the user chooses, together with a detailed description of what the code does.

Thanks,
Christos