Update checkpoints and version number, and add rbrunner's MMS multisig thinger.
https://taiga.getmonero.org/project/rbrunner7-really-simple-multisig-transactions/wiki/beta-manual
https://www.youtube.com/watch?v=UElJYkZYVBs
To update with git:
cd wownero
git fetch --tags && git checkout tags/v0.3.1.1 -b v0.3.1.1
make
Check branch hash with command git rev-parse HEAD
0edab6407f70e2e7b7296f621f0be37c4504c586