Remove "magic" importing of components/containers/etc.

[bmbarker90]

I propose that we remove "magic" importing of things. I think it gets rid of one of the advantages and reasons why to use es6 modules. I think we should require people to be explicit about what they are including in their files and mindful of how much stuff they are importing.

Furthermore, it prevents certain bugs that are very hard to debug. For example, let's assume that for whatever reason someone deleted BarComponent that was being used in FooBarModule by FooComponent. If I am not being explicit about importing BarComponent, the only way that I know that it isn't there anymore is that it doesn't render BarComponent at runtime. That is really hard to debug. If I'm explicitly importing BarComponent, the app will fail to build and I will realize that BarComponent is indeed needed and be able to see where it is needed.

[sldavidson]

I am going to have to agree with Ben on this.