Add Mode.h for storing ofxPiMapper mode enum

src/Mode.h

@@ -0,0 +1,14 @@
+#pragma once
+
+namespace ofx {
+namespace piMapper {
+
+enum Mode {
+	PRESENTATION_MODE,
+	TEXTURE_MODE,
+	MAPPING_MODE,
+	SOURCE_MODE
+};
+
+} // namespace piMapper
+} // namespace ofx