update readme

README.md

@@ -6,3 +6,10 @@
 [html](https://alistairmichael.com/notes/csse2002)
 
 Pull requests are welcome.
+
+## Building
+
+```
+pandoc notes.md --toc --template template.latex -o notes.pdf
+pandoc notes.md -s --css style.css --toc -o notes.html  --template template.html --self-contained
+```

notes.md

@@ -1370,16 +1370,16 @@ students.stream()
 
 The basic case of recursion is a function calls itself, reducing the size of 
 the problem at each subsequent call, to progress towards a base case. 
-
-    function {
-        if (base case) {
-            return;
-        }
-        else (reduction cases) {
-            return function();
-        }
+```
+function {
+    if (base case) {
+        return;
     }
-
+    else (reduction cases) {
+        return function();
+    }
+}
+```
 This has the risk of stack overflows, because each call adds to the callstack.
 
 Recursion is more elegant for some types of problems, which are naturally 
@@ -1435,4 +1435,9 @@ Visualisation Sites:
 - [sorting.at](http://sorting.at)
 
 
+# Contributing 
+
+Source for this page is available 
+[here](https://git.topost.net/alistair/csse2002-notes/src/branch/master).
 
+Contributions are welcome.