Fixes

-=-=-

-Fixed normalmap depth parameter
-Fixes to DirAccess on Windows
-Double click on resource dock will open them
-Fixes to doc generator (should make github wiki on class list more up to date)

servers/visual/shader_language.cpp

@@ -1043,6 +1043,7 @@ const ShaderLanguage::BuiltinsDef ShaderLanguage::fragment_builtins_defs[]={
 	{ "TANGENT", TYPE_VEC3},
 	{ "BINORMAL", TYPE_VEC3},
 	{ "NORMALMAP", TYPE_VEC3},
+	{ "NORMALMAP_DEPTH", TYPE_FLOAT},
 	{ "UV", TYPE_VEC2},
 	{ "UV2", TYPE_VEC2},
 	{ "COLOR", TYPE_VEC4},