added install option to makefile and a manpage

src/keys.h

@@ -12,6 +12,7 @@
 #define K_CLOSE 5
 #define K_HOTKS 6
 #define K_USPLT 7
+#define K_SKIP  8
 
 struct keymap
 {
@@ -22,6 +23,7 @@ struct keymap
 	uint16_t CLOSE;
 	uint16_t HOTKS;
 	uint16_t USPLT;
+	uint16_t SKIP;
 };
 
 extern char buf;