Intermediate kOS Tutorial

No pictures, just text and code. I hope it's not too dry. I haven't tested the code yet either, but it's essentially complete.
I'd rephrase this as "A solution is to...", rather than "THE solution is to..."  There's plenty of other ways to fix the problem, like setting a boolean flag so the if condition only triggers once:
```
IF SHIP:ALTITUDE > 10000 AND NOT DID_ONCE {
    LOCK STEERING TO HEADING(90,45).
    SET DID_ONCE TO TRUE.
}
```