Create 'hydrate' api methods for each important page

[voidxnull]

The purpose of hydrate methods is to be able to fetch all the data needed to render a page in a single request.

The possible implementation needs to be discussed.

Example:

1. get /api/v1/hydrate/index
2. dispatch({ type: HYDRATE_STATE, payload: ... })

Now we have everything we need to render the List page.