Method calls and optimistic UI

Hey guys,

I think #114 might have been closed to quickly.

Wrapping calls to collection methods in Meteor methods truly is a best practice for a couple reasons including data validation, permissions/security or optimistic UI.

I don't totally agree with @grsabreu that code could not be shared between the React Native application and the server-side Meteor application. Actually, all of our shared code is defined in a npm package included in both our React Native application and our Meteor application.

I don't see any easy solution right now, but I think it's worth to keep that as an ongoing reflection.