added emacs packages

This needs some cleanup, but with this package I can install emacs 24.3 on any machine with:

```
conda install --force -c https://conda.binstar.org/paddy emacs emacs_libs &&  source ~/anaconda/envs/paddy_emacs2/bin/start_emacs.sh
```

where `paddy_emacs2` is the name of my anaconda environment