[update] Adding README + bootstrap phase + some cleanup

- Adding a readme to explain how to start using the repository
- Adding a bootstrap phase that installs:
  - **openjdk 7**
  - **leiningen 2**
  - **emacs 24**
  - **emacs-live**
  - a default **~/.lein/profiles.clj** with recent plugins
- Cleanup the **Vagrantfile**

This is a more cleaner step as before but there are limitations, regarding network (at least the first time around)

*Note* I already made a vagrant box but I do not know where to upload it.