manage guis in bundle compiler

engine/compilers/BundleCompiler.cpp

@@ -48,6 +48,7 @@ namespace unit_resource { extern void compile(Filesystem&, const char*, File*);
 namespace sound_resource { extern void compile(Filesystem&, const char*, File*); }
 namespace sprite_resource { extern void compile(Filesystem&, const char*, File*); }
 namespace material_resource { extern void compile(Filesystem&, const char*, File*); }
+namespace gui_resource { extern void compile(Filesystem&, const char*, File*); }
 
 //-----------------------------------------------------------------------------
 BundleCompiler::BundleCompiler()
@@ -161,6 +162,10 @@ bool BundleCompiler::compile(const char* bundle_dir, const char* source_dir, con
 			{
 				material_resource::compile(root_fs, filename, out_file);
 			}
+			else if (resource_type_hash == GUI_TYPE)
+			{
+				gui_resource::compile(root_fs, filename, out_file);
+			}
 			else
 			{
 				Log::e("Oops, unknown resource type!");