Added prop-types validation to unchecked components.

[excitement-engineer]

Added prop-types validation to the <Query />, <Subscription /> and <ApolloConsumer /> component

[rosskevin]

Please increase the bundle size - otherwise looks good.

[jbaxleyiii]

ugh, I hate prop-types in libraries but since we use context I guess we have them already? With the move to react's new context though I wonder if depending on prop-types will be necessary? If not, I'd like to not ship them anymore?

Thoughts? Are they still used / valuable?

[excitement-engineer]

I personally don't use them as I use flow on all my react projects. However, for those that don't use any typings they could be valuable. I know that react-router uses them for example.