Create additional components for entities and users' entities

[bookstein]

1. Add (rename) component for /users/id/entities
2. Add new component for ALL entities

Right now we have:
<ReactRouter.Route path="/" component={EntityTable}/> // just the user's entities

We want to add:
<ReactRouter.Route path="/all" component={EntityTable}/> // all entities

[bookstein]

Found a bug: if the server responds with nothing (as in the case of /entities when it returned only a rendered template and didn't send rows), then an error appears in the dev console and we show no results in the table.