0.13A: Candidate for Weaksauce Weakness

• Improved performance for nodes with >100 peers.
• Disable InitialRebalancer because it just is not economically rational.
• Allow disabling rebalancer by new clboss-unmanage tag balance.

As is usual, download the official release tarball clboss-0.13A.tar.gz, untar, and ./configure && make and update your lightningd config file.