Improve the RPMs for the data warehousing

This pull request adds all the dependencies for installing the data warehouse and making it run.  The Elasticsearch Python module (pyes) is not available as RPM in EPEL or RPMforge.  However, it's trivial to build with:

```sh
easy_install -e -b /tmp/ pyes
cd /tmp/pyes
python setup.py bdist_rpm
```

We also install scripts in /usr/bin and config files in /etc.