Code quality process TODO

[TechnikEmpire]

Document offline coverity build process:

• Need build tools command prompt + cov-build in PATH
• Travis-CI doesn't support this with .NET core presently
• SonarQube analysis process (offline server, but need a way to export issues into Github tickets if possible)
• Codacity (pretty sure this is automatic)
• May be able to move coverity auto-build over to AppVeyor by issuing custom commands.
• Command example:
  cov-build --dir cov-int msbuild /t:Rebuild /p:Configuration=Release /p:Platform="Any CPU" /p:AllowUnsafeBlocks="True"
• For CitadelCore.Windows, need a SLN doesn't include the "Tests" program.
• Need real unit tests.