added OpenCL cloth demo, contributed by AMD.

updated GpuSoftBodySolvers
updated DirectCompute cloth demo

Demos/OpenCLClothDemo/fragment.glsl

@@ -0,0 +1,7 @@
+uniform sampler2D tex;
+	
+void main()
+{
+	vec4 color   = texture2D(tex,gl_TexCoord[0].st);
+	gl_FragColor = color;
+}