fix docker run ImportError: No module named pybitcointools

docker run problem
```
$ git clone https://github.com/OpenBazaar/OpenBazaar
$ cd OpenBazaar
$ sudo  docker build -t=test/ob .
$ sudo  docker run -i -t test/ob /bin/bash
root@12cb00b6e3d7:/bazaar# bash run.sh
/usr/bin/python2
Production Mode
File ob.db does not exist. Running setup script.
DB_PATH db/ob.db
Traceback (most recent call last):
  File "node/tornadoloop.py", line 8, in <module>
    from crypto2crypto import CryptoTransportLayer
  File "/bazaar/node/crypto2crypto.py", line 21, in <module>
    from pybitcointools import *
ImportError: No module named pybitcointools
```
referred to the configure.sh and provide the bind 127.0.0.1 workround.
```
$ git clone https://github.com/OpenBazaar/OpenBazaar
$ cd OpenBazaar
$ sudo docker build -t=test/ob .
$ sudo docker run -d -p 8888:8888 test/ob
$ sudo docker ps
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                                                   NAMES
79a3d6b545dc        test/ob:latest      /bin/sh -c 'bash run   23 minutes ago      Up 23 minutes       12345/tcp, 8889/tcp, 8890/tcp, 0.0.0.0:8888->8888/tcp   tender_wilson
$ curl -v http://YOUR_DOCKER_HOST_IP:8888
* Hostname was NOT found in DNS cache
*   Trying 192.168.1.79...
* Connected to 192.168.1.79 (192.168.1.79) port 8888 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.35.0
> Host: 192.168.1.79:8888
> Accept: */*
>
< HTTP/1.1 302 Found
< Date: Mon, 01 Sep 2014 07:42:20 GMT
< Content-Length: 0
< Content-Type: text/html; charset=UTF-8
< Location: /html/index.html
* Server TornadoServer/4.0.1 is not blacklisted
< Server: TornadoServer/4.0.1
```

Is there any way to setup  node/tornadoloop.py http_ip ?
We don't currently require `tor` and `privoxy` for building. While these will be desired tools in a future beta which achieves anonymity, we have not yet fully decided on whether we will utilize tor, i2p, or freenet as our anonymizing transport layer. Therefore, these should be removed from the installation process.