add materials (mat) files and readme.md

cstrike/models/player/guerilla.mdl/guerilla.mdl.mat

@@ -0,0 +1,16 @@
+
+{
+"for" "#models/guerilla/Backpack1.mdl"
+"basecolor_map" "Backpack1.png"
+//"normal_map" "Backpack1_normal.png"
+//"metal_map" "Backpack1_metal.png"
+//"roughness_map" "Backpack1_roughness.png"
+}
+
+{
+"for" "#models/guerilla/GUERILLA_DMBASE.mdl"
+"basecolor_map" "GUERILLA_DMBASE.png"
+//"normal_map" "GUERILLA_DMBASE_normal.png"
+//"metal_map" "GUERILLA_DMBASE_metal.png"
+//"roughness_map" "GUERILLA_DMBASE_roughness.png"
+}