Add download hashes for the default mod packages.

mods/ra/installer/downloads.yaml

@@ -1,4 +1,5 @@
 quickinstall: Quick Install Package
+	SHA1: 44241f68e69db9511db82cf83c174737ccda300b
 	MirrorList: http://www.openra.net/packages/ra-quickinstall-mirrors.txt
 	Extract:
 		^Content/ra/v2/allies.mix: allies.mix
@@ -40,7 +41,9 @@ quickinstall: Quick Install Package
 		^Content/ra/v2/expand/myeehaw1.aud: expand/myeehaw1.aud
 		^Content/ra/v2/expand/myes1.aud: expand/myes1.aud
 		^Content/ra/v2/cnc/desert.mix: cnc/desert.mix
+
 basefiles: Base Freeware Content
+	SHA1: aa022b208a3b45b4a45c00fdae22ccf3c6de3e5c
 	MirrorList: http://www.openra.net/packages/ra-base-mirrors.txt
 	Extract:
 		^Content/ra/v2/allies.mix: allies.mix
@@ -54,7 +57,9 @@ basefiles: Base Freeware Content
 		^Content/ra/v2/sounds.mix: sounds.mix
 		^Content/ra/v2/speech.mix: speech.mix
 		^Content/ra/v2/temperat.mix: temperat.mix
+
 aftermath: Aftermath Expansion Files
+	SHA1: d511d4363b485e11c63eecf96d4365d42ec4ef5e
 	MirrorList: http://www.openra.net/packages/ra-aftermath-mirrors.txt
 	Extract:
 		^Content/ra/v2/expand/chrotnk1.aud: expand/chrotnk1.aud
@@ -84,11 +89,15 @@ aftermath: Aftermath Expansion Files
 		^Content/ra/v2/expand/mwrench1.aud: expand/mwrench1.aud
 		^Content/ra/v2/expand/myeehaw1.aud: expand/myeehaw1.aud
 		^Content/ra/v2/expand/myes1.aud: expand/myes1.aud
+
 cncdesert: C&C Desert Tileset
+	SHA1: 039849f16e39e4722e8c838a393c8a0d6529fd59
 	MirrorList: http://www.openra.net/packages/ra-cncdesert-mirrors.txt
 	Extract:
 		^Content/ra/v2/cnc/desert.mix: cnc/desert.mix
+
 music: Freeware Music
+	SHA1: 134200e10b6e85b2d9bd4f0fe370ab57b75d1563
 	MirrorList: http://www.openra.net/packages/ra-scores-mirrors.txt
 	Extract:
-		^Content/ra/v2/scores.mix: scores.mix
+		^Content/ra/v2/scores.mix: scores.mix