add FAQ. Closes #12

Readme.md

@@ -31,6 +31,7 @@ alias node='node --harmony-generators'
  - [G+ Community](https://plus.google.com/communities/101845768320796750641)
  - [Mailing list](https://groups.google.com/forum/#!forum/koajs)
  - __#koajs__ on freenode
+ - [FAQ](docs/faq.md)
 
 ## Example
 

docs/faq.md

@@ -0,0 +1,12 @@
+
+# Frequently Asked Questions
+
+## Does Koa replace Express?
+
+  No, it's more like Connect.
+
+## Does Koa replace Connect?
+
+  No, just a different take on similar functionality
+  now that generators allow us to write code with less
+  callbacks. Connect is equally capable, and some may still prefer it.