FMod - v2.11

After consulting with an Abiathar tester today, I published all recent changes as v2.11. I made one tiny tweak before finalizing it: to make sure it wouldn't crash on Windows XP (which supports only .NET Framework version 4.0), I made sure to handle any errors generated by the attempt to enable support for TLS 1.1 and 1.2. When running on .NET 4.0, the constants signifying those settings are not valid values for ServicePointManager.SecurityProtocol. The auto-updater will still not work on Windows XP under the current hosting setup, but at least it can make the attempt to contact the update server.