Two more standard examples for type wrapping and InternalFunction

Here are two of the test files I used to get familiar with some of the concepts I needed. I've cleaned them up and commented everything.

Adding a pull request in the hopes that the next person starting on similar problems may find them useful. Feel free to commit or reject as you like.
We have been preferring `indent-tabs-mode: nil;` as the last part, but I have not converted all old files as I am not a fan of mass commits of minor issues (like this) which tend to obscure revision history.  Could you make the change here though?