Developer Guide samples should set up the required WebLayout

[jng]

The current Developer Guide samples require manually loading their associated packages first in order to function.

But if you look at what is actually inside these packages, it is just a WebLayout? document, which we can easily load in ourselves through code.

Doing it this way, we can do away with needing to load packages and it also demonstrates loading dynamic WebLayout? documents.

[jng]

Fixed r6777, r6778, r6779 and r6780