Update README.md coomunity and git URL to V3
Issue: #216 (closed)
community.torproject.org http://xmrhfasfg5suueegrnc4gsgyi2tyclcy5oz7f5drnrodmdtob6t2ioyd.onion/
git.torproject.org http://xtlfhaspqtkeeqxk6umggfbr3gyfznvf4jhrge2fujz53433i2fcs3id.onion/
Proof: https://onion.torproject.org/
Reviewer: @gus