docs(cheatsheet): add cheatsheet

public/docs/ts/latest/guide/_data.json

@@ -5,6 +5,10 @@
     "title": "Developer Guides"
   },
 
+  "cheatsheet": {
+    "title": "Angular Cheat Sheet"
+  },
+
   "displaying-data": {
     "title": "Displaying Data",
     "intro": "Displaying data is job number one for any good application. In Angular, you bind data to elements in HTML templates and Angular automatically updates the UI as data changes."

public/docs/ts/latest/guide/cheatsheet.jade

@@ -1,9 +1,9 @@
 .banner
-  p.text-body Angular 2 is currently in Developer Preview.  We recommend using Angular 1.x for production applications.
+  p.text-body This cheat sheet is provisional and may change. Angular 2 is currently in Developer Preview.
 
 article(class="l-content-small grid-fluid docs-content")
   .cheatsheet
-    h2 Angular for TypeScript Cheat Sheet (v2.0.0-alpha.43)
+    h2 Angular for TypeScript Cheat Sheet (v2.0.0-alpha.44)
     .downloads
       a.download(href='AngularCheatSheet_Letter.pdf')
         span.icon.icon-cloud-download