Add plugins files missing from earlier commit

src/lsi/plugin.h

@@ -0,0 +1,10 @@
+/* plugin.h */
+
+struct plugin {
+	char *pl_name;
+	int (*pl_init)(void);
+	void (*pl_shutdown)(void);
+	int pl_active;
+	/* function table? */
+};
+

src/lsi/plugins.c

@@ -0,0 +1,23 @@
+/* plugins.c */
+
+/*
+ * This is the master table of plugins. Add a plugin here
+ * for it to take effect.
+ */
+
+#include "plugin.h"
+
+#include "midi.h"
+#include "dmx.h"
+#include "beatdetect.h"
+#include "mouse.h"
+
+struct plugin plugins_table[] = {
+	{"midi", midi_init, midi_close, 0},
+	{"dmx", dmx_init, dmx_close, 0},
+	{"beatdetect", beatdetect_init, beatdetect_close, 0},
+	{"mouse", mouse_init, mouse_close, 0},
+};
+
+int nplugins = (sizeof(plugins_table) / sizeof(struct plugin));
+

src/lsi/plugins.h

@@ -0,0 +1,13 @@
+/* plugins.h */
+
+/*
+ * The master table of plugins is found in plugins.c. This is
+ * just a declaration to allow the table to be used.
+ */
+
+#include "plugin.h"
+
+extern struct plugin plugins_table[];
+
+extern int nplugins;
+