use github markdown syntax

Author: daaku

readme.md

@@ -5,44 +5,46 @@ A nodejs directory walker. Broadcasts events for various file types as well as
 a generic "entry" event for all types and provides the ability to prune
 directory trees. This shows the entire API; everything is optional:
 
-    Walker('/etc/')
-      .filterDir(function(dir, stat) {
-        if (dir === '/etc/pam.d') {
-          console.warn('Skipping /etc/pam.d and children')
-          return false
-        }
-        return true
-      })
-      .on('entry', function(entry, stat) {
-        console.log('Got entry: ' + entry)
-      })
-      .on('dir', function(dir, stat) {
-        console.log('Got directory: ' + dir)
-      })
-      .on('file', function(file, stat) {
-        console.log('Got file: ' + file)
-      })
-      .on('symlink', function(symlink, stat) {
-        console.log('Got symlink: ' + symlink)
-      })
-      .on('blockDevice', function(blockDevice, stat) {
-        console.log('Got blockDevice: ' + blockDevice)
-      })
-      .on('fifo', function(fifo, stat) {
-        console.log('Got fifo: ' + fifo)
-      })
-      .on('socket', function(socket, stat) {
-        console.log('Got socket: ' + socket)
-      })
-      .on('characterDevice', function(characterDevice, stat) {
-        console.log('Got characterDevice: ' + characterDevice)
-      })
-      .on('error', function(er, entry, stat) {
-        console.log('Got error ' + er + ' on entry ' + entry)
-      })
-      .on('end', function() {
-        console.log('All files traversed.')
-      })
+```javascript
+Walker('/etc/')
+  .filterDir(function(dir, stat) {
+    if (dir === '/etc/pam.d') {
+      console.warn('Skipping /etc/pam.d and children')
+      return false
+    }
+    return true
+  })
+  .on('entry', function(entry, stat) {
+    console.log('Got entry: ' + entry)
+  })
+  .on('dir', function(dir, stat) {
+    console.log('Got directory: ' + dir)
+  })
+  .on('file', function(file, stat) {
+    console.log('Got file: ' + file)
+  })
+  .on('symlink', function(symlink, stat) {
+    console.log('Got symlink: ' + symlink)
+  })
+  .on('blockDevice', function(blockDevice, stat) {
+    console.log('Got blockDevice: ' + blockDevice)
+  })
+  .on('fifo', function(fifo, stat) {
+    console.log('Got fifo: ' + fifo)
+  })
+  .on('socket', function(socket, stat) {
+    console.log('Got socket: ' + socket)
+  })
+  .on('characterDevice', function(characterDevice, stat) {
+    console.log('Got characterDevice: ' + characterDevice)
+  })
+  .on('error', function(er, entry, stat) {
+    console.log('Got error ' + er + ' on entry ' + entry)
+  })
+  .on('end', function() {
+    console.log('All files traversed.')
+  })
+```
 
 You specify a root directory to walk and optionally specify a function to prune
 sub-directory trees via the `filterDir` function. The Walker exposes a number