Major redux refactor and file restructure

[Ligerx]

• Installed react-redux 7.1.0-rc.1 for hooks. Need to update the version once a stable version is released Update redux to v7.1 stable #59

• extract all selectors to their relevant duck

• utilize reselect and re-reselect where relevant

• replace all relative imports with absolute imports

• look into getting router props into redux, is it helpful? Doesn't seem too useful right now, and even less so when react router supports hooks

• get rid of containers and utilize redux hooks

• use Material-UI style hook where applicable not worth the effort to refactor ALL components. But continue to use the hooks for any new code.

• get rid of Containers and Pages

• move selectors and dispatch down to lower components where relevant created Move selectors and dispatch down to lower components where relevant #67 to track this

• rename redux-ducks to just redux (redux taken, can't think of a better name right now)

• add typing for the entire state object

• add typing for redux actions?

• add typing for selectors?

closes #50, closes #51, closes #53

[Ligerx]

• bug: sometimes catalogue and viewing a manga in catalogue just breaks. Not fixed, refer to Update <helmet> to use props instead of children #28
• Do I need to refactor error and loading selector factories? gave up Use reselect for loading and error selectors #60
• bug: MangaInfo seems to be updating chapters without any human interaction. Not fixed, refer to MangaInfo seems to be updating chapters all the time #65

[Ligerx]

If you wanna be super legit about Redux typing, it gets complicated
https://blog.callstack.io/type-checking-react-and-redux-thunk-with-flow-part-2-206ce5f6e705

That said I think VSCode flow integration is kinda broken right now for some reason, so it's difficult to see if any types I'm adding are working... =(

[Ligerx]

Was running into some problems with Flow not starting in VSCode
flow/flow-for-vscode#224

^ that fixed one problem, but hover still doesn't seem to work for me =((((
flow/flow-for-vscode#146

I'm going to have to push off additional typing until after I get Flow fixed

I've created an issue to track this #66