Rospy import *

Hi, 

Doing 
```python
from rospy import *
```
raises the following exception : 
```
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'rospy' has no attribute 'NodeProxy'
```
After some investigations, `NodeProxy` doesn't seem to exist anymore in the codebase. Simply removing it from the exports should do the trick.
