Adds support for 4 channel boxes and overview in Readme

db/counterbox_v2.db

@@ -47,6 +47,26 @@ record(ai, "$(P):$(NAME):READALL")
  field(FLNK, "$(P):$(NAME):UNSET-COUNTING")
 }
 
+record(longin, "$(P):$(NAME):M5")
+{
+ field(DESC, "Counterbox CH5")
+}
+
+record(longin, "$(P):$(NAME):M6")
+{
+ field(DESC, "Counterbox CH6")
+}
+
+record(longin, "$(P):$(NAME):M7")
+{
+ field(DESC, "Counterbox CH7")
+}
+
+record(longin, "$(P):$(NAME):M8")
+{
+ field(DESC, "Counterbox CH8")
+}
+
 record(longin, "$(P):$(NAME):M9")
 {
  field(DESC, "Counterbox CH9")