[oden] Notes on multisampling

I tried to enable it and was unable to.

src/lib.rs

@@ -689,6 +689,14 @@ impl State {
             },
             depth_stencil: None,
             multisample: wgpu::MultisampleState {
+                // TODO: We could multisample text but it would be the only
+                //       thing we multisampled, and it complicates our use of
+                //       render passes considerably. Specifically, the pass
+                //       needs to be configured to render to a target with
+                //       multisampling enabled, and that is only compatible
+                //       with pipelines that have multisampling
+                //       configured. For now, we don't do this, and remember
+                //       that we could do it someday.
                 count: 1,
                 mask: !0,
                 alpha_to_coverage_enabled: true,