fixes to make uproxy work with latest uproxy-lib and uproxy-networking

This updates uproxy to use the latest uproxy-networking and uproxy-lib (still freedom 0.5, but using the new dist directory layout). 

Turned out major version number bumps didn't actually break anything uProxy was using. nice. 

TESTED: 
 * grunt test
 * end-to-end manual test proxying a few sites.  
Why is this called common?