Initial moves toward a dependency handler
Move URL variables to their own package scripts
"Finish" dependency resolver, it should actually resolve dependencies now
Update libpng and zlib URLs
Add python3 to package lists explicitly\
better safe than sorry...
Add executable bit for depengine.py
fix libpng URL
fix libsdl_image FTBFS, source scripts properly
add message for get-uqm-source.chroot
Update UQM buildscripts
Hack to make guest additions work (hopefully)
Hopefully fix some of the more glaring problems

 Apparently --apt-recommends=false is a fairly dangerous option to pass
 lb config. While it removes quite a bit of unneded (to us) garbage
 (like a full X11 environment dragged in, ultimately, by virtualbox
 guest additons), apparently some more important things are dragged in
 by recommends, like the tools live-config uses to generate the user
 at runtime... I've looked through a diff between packages installed in
 a build with recommends enabled and one with recommends disabled, and
 added some important things like user-setup explicitly to package lists.
Hopefully make VM autobuilding *really* work

 This commit introduces what is probably the most ugly, evil, and
 horrifying hack in this entire thing. Pretty much any alternate
 method which works would be superior, but at this time I can't find
 one :/
rm typo
Some assorted fixes to build_uqm.sh

 I *think* the whole automatic VM build thing should work
 correctly now!
Merge branch 'depengine' of github.com:oldlaptop/uqm-crossbuilder into depengine
One last fix to build_uqm.sh
Another minor fix
Merge branch 'depengine'

 Since the dependency engine is not causing any breakage in
 all of the test builds I've run on planty, and especially
 since the depengine branch now contains some fixed URLs
 and improvements to VM autobuilding (it halfway works now!),
 I'm merging it in.

Conflicts:
	config/hooks/build-uqm-dependencies.chroot