add RtMini test/library (works under Windows)

minor cleanups

btgui/MidiTest/premake4.lua

@@ -0,0 +1,33 @@
+
+	project "rtMidiTest"
+		
+	kind "ConsoleApp"
+	
+--	defines {  }
+	
+	targetdir "../../bin"
+	
+	includedirs 
+	{
+		".",
+	}
+
+			
+--	links { }
+	
+	
+	files {
+		"**.cpp",
+		"**.h"
+	}
+	if os.is("Windows") then
+		links {"winmm"}
+		defines {"__WINDOWS_MM__", "WIN32"}
+	end
+
+	if os.is("Linux") then 
+	end
+
+	if os.is("MacOSX") then
+		links{"Cocoa.framework"}
+	end