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
Is this supposed to be allowNonUnicast?