Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/master/heart_beat_error b/doc/master/heart_beat_error
new file mode 100644
index 0000000..d4d15f2
--- /dev/null
+++ b/doc/master/heart_beat_error
@@ -0,0 +1,24 @@
+SYNOPSIS
+ mixed heart_beat_error(object culprit, string err, string prg,
+ string curobj, int line)
+
+DESCRIPTION
+ This function is called when a runtime error occurs while
+ executing the heart_beat() function of the object culprit. prg
+ is program where the actual error happened, in object curobj
+ at the given line.
+
+ At time of call, the heart_beat has been turned off.
+ Return anything != 0 to restart the heart_beat in culprit.
+
+ If culprit is a user, it should at least get the message ``You
+ have no heartbeat''. A more advanced handling would destruct
+ the offending object curobj and and allow the heartbeat to
+ restart.
+
+ Note that prg denotes the program actually executed (which
+ might be an inherited one) whereas curobj is just the
+ offending object.
+
+SEE ALSO
+ set_heart_beat(E), heart_beat(A), runtime_error(M)