Finish member-record documentation.

MODULES.md

@@ -196,6 +196,115 @@ Returns ```#t``` if there are any ```'error``` type highlights in
 ```mr```, or it is not ```member-record-usable?``` or the
 ```member-id``` is not 4-digit prime number.
 
+    (member-destroyed? mr)
+
+* ```mr``` - a member record structure
+
+Returns ```#t``` if the member is not existing and already has existed
+in the past.
+
+    (member-suspended? mr)
+
+* ```mr``` - a member record structure
+
+Returns ```#t``` if the current month falls within any of given member's
+suspended periods.
+
+    (member-active? mr)
+
+* ```mr``` - a member record structure
+
+Returns ```#t``` if given member exists, is a member and is currently
+not suspended.
+
+    (member-student? mr)
+
+* ```mr``` - a member record structure
+
+Returns ```#t``` if given member exists, is a member, is currently not
+suspended and current month falls within any member's suspended
+periods.
+
+    (member-existing? mr)
+
+* ```mr``` - a member record structure
+
+Returns ```#t``` if given member exists - that is the current month is
+within any of the member (membership) periods.
+
+    (member-flags mr)
+
+* ```mr``` - a member record structure
+
+Returns a list of member flags which can be any of the following:
+
+* ```'student```
+* ```'suspended```
+* ```'active```
+* ```'destroyed```
+* ```'existing```
+
+The ```'existing``` and ```'destroyed``` are mutually exclusive. Also
+```'active``` and ```'suspended``` are mutually exclusive.
+
+    (member-nick mr)
+
+* ```mr``` - a member record structure
+
+Returns member's nick from its ```'info``` section.
+
+    (member-id mr)
+
+* ```mr``` - a member record structure
+
+Returns given member's id.
+
+    (member-suspended-months mr)
+
+* ```mr``` - a member record structure
+
+Returns the number of months this member is suspended in
+```(*current-month*)```. If the member is not suspended, returns
+```0```.
+
+    (member-format fmt mr)
+
+* ```fmt``` - format string
+* ```mr``` - a member record structure
+
+Fills the following template substitutions in the ```fmt``` string:
+
+* ```~N``` - member's nick
+* ```~I``` - member's id
+* ```~S``` - number of months this member has been suspended
+* ```~E``` - number of highlights in square brackets if there is at least one
+* ```~~``` - literal ```~```
+
+Other parts of the string are retained.
+
+    (member<? a b)
+
+* ```a``` - a member record structure
+* ```b``` - a member record structure
+
+Returns true if member ```a```'s nick comes before ```b```'s nick in
+the lexicographical order.
+
+    (member-record-add-payment mr pt)
+
+* ```mr``` - a member record structure
+* ```pt``` - bank transaction of the payment
+
+Adds (prepends) given transaction ```pt``` to given member record
+```mr```'s ```'payments'``` key list.
+
+    (member-payments mr)
+
+* ```mr``` - a member record structure
+
+Returns the payments (bank transactions) list of given member record
+```mr``` defaulting to an empty list.
+
 ### Member Parser
 
 ### Members Directory