need to add installation of python redis wrapper to deploy script

[mtholder]

We needed version 2.10 of the python client.

Perhaps this should be in https://github.com/OpenTreeOfLife/phylesystem-api/blob/master/requirements.txt instead of the deployment script.

The steps I used (to get the phylesystem-api working again on api) were:

wget -O downloads/redis-2.10.6.tar.gz https://pypi.python.org/packages/09/8d/6d34b75326bf96d4139a2ddd8e74b80840f800a0a79f9294399e212cb9a7/redis-2.10.6.tar.gz#md5=048348d8cfe0b5d0bba2f4d835005c3b
cd downloads
tar xfvz redis-2.10.6.tar.gz
cd redis-2.10.6
python setup.py install