dirty = true propogates up, dirty = false propogates down.

commit it.

Also, a couple new patches for a previous commit that I apparently
hadn't added.

This should be made palette-aware as well, but since the current
consumer doesn't modify the palette, it's good enough for now.

Still a bunch more work to do on labels... sizers come next.

I think this is ready to start drawing things soon now.

Getting design to completion... just need to figure out how to do
pre-defined trees of controls, and I should be able to start work
on the actual rendering bits.

It's expected that transparency will be handled by special values.

Start hacking on fit-checking code
Add NI_walk_children() to call a callback for each child
Move functions that have no generated bits into newifv_nongen.c
Call the object set/get function for globals to allow range checking

Basically, the intent is to do a modern (for C) interface which
allows reproducing the look and feel of uifc but without hurting
as much.

The intent is to support a tree of objects, each of which have
an attribute get/set function as their main interface.

Various callbacks will be supported for various object types, and
positioning will be relative to the "child area" of the parent.

The SyncTERM main screen is expected to look something like:
root
+--frame (dialing directory)
|  +--list
+--frame (settings)
|  +--list
+--textinput (comment)

Internally, the code is wildly type-unsafe, but there's an
auto-generated API (which is the only thing exported) that is
type-safe.

This also introduces the CuTest C test suite as an experiment.