Missing ValueRef Features

[zicklag]

Here are some things we need to figure out how to expose to JavaScript on JsValueRefs. Creating a list so I don't forget.

• [ ] Indexing into maps
• [ ] Insert/Remove items from lists
• [x] Equality Checks: #23
  • [ ] Update types, currently TypeScript doesn't know about the .eq() method.
• [ ] Cloning
• [ ] Hashing ( Not sure if it's that useful, but since it's in the reflect trait we might as well support it. )
• [ ] Option/null handling. For instance, it's hard/impossible to check if an Option<Entity> is None.

[jakobhellermann]

• [x] creating new values
• [ ] dealing with enums

[jakobhellermann]

I'm ticking off "creating new values" because Value.create(Type) now exists.