fixes #100 #63

Adding a custom redux store so we can have finer grain control over our DApp state. Right now, our Redux store is being used alongside the Drizzle context, but at some point we should phase out drizzle in favor of using our own store, using just what we need.

For now, I'm making the redux store so we can handle the caching of events when the DApp loads so we can avoid some of the loading screens.