add note about stringify to the readme

README.md

@@ -1,7 +1,8 @@
-# NeXTStep plist parser
+# NeXTStep plist parser and writer
 
-parse NeXTStep style plists in node. these are not the xml style, but the older
-NeXTStep style (a similar filetype is used in GNUStep, with extensions)
+parse and generate NeXTStep style plists in node. these are not the xml style,
+but the older NeXTStep style (a similar filetype is used in GNUStep, with
+extensions)
 
 the only place i know of to still use them in macOS is
 `~/Library/KeyBindings/DefaultKeyBinding.dict`
@@ -17,11 +18,15 @@ const plist = `{
   "~f" = "moveWordForward:",
   "~b" = "moveWordBackward:"
 }`
-const {parse} = require('nextstep-plist')
-parse(plist) // {'~f': 'moveWordForward:', '~b': 'moveWordBackward:'}
+const {parse, stringify} = require('nextstep-plist')
+const js = parse(plist) // {'~f': 'moveWordForward:', '~b': 'moveWordBackward:'}
+stringify(js) // '{ "~f" = "moveWordForward:"; "~b": "moveWordBackward":}'
 ```
 
 ## todo
 * clean up this code
 * support `<binary>` syntax
 * support comments
+* make the output prettier
+* write tests for stringify
+* tell @gnarf