Update README.md
Merge branch 'master' of github.com:DanielRapp/fragment.js

* 'master' of github.com:DanielRapp/fragment.js:
  Minor fix to last.
  Templates can be recursive, including cascading interpolation contexts. Minor fix to onreadystatechange to handle engines that like to invoke it multiple times when readyState is 4.
  Update README.md