Cleanup mod packaging; also fixes the 'cannot find mixes->recurse to /' bug

mods/cnc/mod.yaml

@@ -2,9 +2,13 @@
 
 Folders:
 	./mods/cnc/
+	./mods/cnc/packages_ra/
+	./shaders
 	./
+
 Packages:
 	mods/cnc/overrides.mix
+# Fully qualify the cnc package names
 	mods/cnc/packages/cclocal.mix
 	mods/cnc/packages/speech.mix
 	mods/cnc/packages/conquer.mix
@@ -12,6 +16,7 @@ Packages:
 	mods/cnc/packages/sounds.mix
 	mods/cnc/packages/tempicnh.mix
 	mods/cnc/packages/updatec.mix
+# Cannot qualify the RA names because they may live inside a mix
 	~main.mix
 	redalert.mix
 	hires.mix
@@ -26,7 +31,6 @@ Packages:
 	conquer.mix
 	sounds.mix
 
-
 LegacyRules:
 	mods/cnc/minimal.ini:	Minimal rules definitions
 	mods/cnc/weapons.ini:	Weapons are still in the old format
@@ -54,7 +58,6 @@ Assemblies:
 	mods/cnc/OpenRa.Mods.Cnc.dll: Cnc mod traits
 	mods/ra/OpenRa.Mods.RA.dll:	Red alert mod traits
 	
-	
 Maps:
 	scg01ea.ini: GDI Mission 1
 	scm01ea.ini: Green Acres