chrome37 fixes (remove dead closing code), removed unused files, link to dev of uproxy-lib

* Some fixed for chrome37 (remove dead closing code)
* Removed unused freedom-module files
* Link to dev of uproxy-lib in package.json - dev should link to dev branches so we know when it breaks. 
* Adds proxy-config parameter to rtc-net for configuration limit of non-routable addresses
Yes, more things to appear in ProxyConfig in the future, e.g. patterns for white/blacklist of domains/IPs have been suggested. Also bandwidth controls.