standardize behaviour of template collisions

[mengwong]

if we define two templates with the same name, at the top-level fillTemplates, the first one gets used. not the second. (edited)

but, at the include() level, the last one gets used.

we should probably standardize this to be "use the first one" and then have people define their own Available Templates above the INCLUDE that points to the Demo Master's main Available Templates.

[wtf]

It makes more sense to standardize this to use the last template everywhere. True to imperative-style side effects. B-)