quickref: individual pages: update links

quickref/quickref-beancount.md

@@ -1,9 +1,12 @@
 % Syntax quick reference: Beancount
 
-# Beancount
+# Syntax quick reference: Beancount
 
-http://furius.ca/beancount/doc/syntax  
-http://furius.ca/beancount/doc/cheatsheet  
+Last tested: 2016.
+See also:
+- https://beancount.github.io/docs/beancount_language_syntax.html
+- https://beancount.github.io/docs/beancount_cheat_sheet.html
+- https://plaintextaccounting.org/quickref
 
 ## Basic example
 

quickref/quickref-hledger.md

@@ -1,8 +1,11 @@
 % Syntax quick reference: hledger
 
-# hledger
+# Syntax quick reference: hledger
 
-http://hledger.org/journal.html  
+Last tested: 2016.
+See also:
+- https://hledger.org/hledger.html#journal-format
+- https://plaintextaccounting.org/quickref
 
 ## Basic example
 

quickref/quickref-ledger.md

@@ -1,9 +1,12 @@
 % Syntax quick reference: Ledger
 
-# Ledger
+# Syntax quick reference: Ledger
 
-https://www.ledger-cli.org/3.0/doc/ledger3.html#Journal-Format  
-http://ricostacruz.com/cheatsheets/ledger.html  
+Last tested: 2016.
+See also:
+- https://www.ledger-cli.org/3.0/doc/ledger3.html#Journal-Format
+- https://ricostacruz.com/cheatsheets/ledger.html
+- https://plaintextaccounting.org/quickref
 
 ## Basic example