Add shaders

Sources/Shaders/Compose.shader

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+Shader "GlobalSnow/Compose" {
+Properties {
+	_MainTex ("Main RGBA", 2D) = "white" {}
+	_SnowedScene ("Snow RGBA", 2D) = "black" {}
+	_SnowedScene2("Snow2 RGBA", 2D) = "black" {}
+	_DistantSnow ("Distant Snow RGBA", 2D) = "black" {}
+	_FrostTex ("Frost RGBA", 2D) = "white" {}
+	_FrostNormals ("Frost Normals RGBA", 2D) = "bump" {}
+	_FrostIntensity ("Frost Data", Vector) = (1,5,0)
+}
+
+SubShader {
+   	ZTest Always Cull Off ZWrite Off
+   	Fog { Mode Off }
+	
+	Pass {
+		CGPROGRAM
+		#pragma vertex vert
+		#pragma fragment frag
+		#pragma multi_compile __ UNITY_COLORSPACE_GAMMA
+		#pragma multi_compile __ FORCE_STEREO_RENDERING
+		#pragma multi_compile __ DISTANT_SNOW JUST_DISTANT_SNOW
+		#pragma multi_compile __ NO_FROST
+		#pragma multi_compile __ NO_SNOW
+		#pragma fragmentoption ARB_precision_hint_fastest	
+		#pragma target 3.0	
+		#include "Compose.cginc"
+		ENDCG
+	}
+	
+	Pass {
+		CGPROGRAM
+		#pragma vertex vert
+		#pragma fragment fragDebug
+		#pragma multi_compile __ UNITY_COLORSPACE_GAMMA
+		#pragma multi_compile __ FORCE_STEREO_RENDERING
+		#pragma multi_compile __ DISTANT_SNOW JUST_DISTANT_SNOW
+		#pragma fragmentoption ARB_precision_hint_fastest	
+		#pragma target 3.0	
+		#include "Compose.cginc"
+		ENDCG
+	}
+
+}
+}