Add new prereqs for bipy/scipy
update to support installation of non-python deps

qiime-deploy now writes a QIIME config file under the deploy dir, even if there is no QIIME target in the conf file. This is necessary since we will be removing QIIME and most of the other python dependencies from qiime-deploy, but we still want a QIIME config file created.

It is now possible to do:

```
pip install numpy==1.7.1
pip install qiime
python qiime-deploy.py ...
```

and get a fully functioning QIIME installation.

Related to, but doesn't completely solve, #55. Still need the qiime-deploy-conf repo updated to fully resolve the issue.
remove extra deps

those shouldn't have been in there...
Merge pull request #56 from jrrideout/issue-55

update to always write QIIME config file