Use Reselect in baseDux

[moshthepitt]

We should adopt Reselect for these reasons i.e. a summary:

• Selectors can compute derived data, allowing Redux to store the minimal possible state.
• Selectors are efficient. A selector is not recomputed unless one of its arguments changes.
• Selectors are composable. They can be used as input to other selectors.

[moshthepitt]

Some inspiration maybe: https://github.com/onaio/reveal-frontend/blob/7008a0460159b8b45c50acaf22a7b4571fd941cc/src/store/ducks/README.md