add routes and params to location

[FredericHeem]

This PR adds routes and params to the location object, these 2 pieces of data are then later used by a redux middleware to find out the component that has been mounted, this middleware then calls a rest api to retrieves the data.
The idea behind the pattern is to decouple a component lifecycle to retrieving its data. componentWillMount no longer initiates the retrieval of its data.
As a consequence, the component can be a pure function, therefore, is easier to test.

[taion]

Take a look at async-props and react-router-relay for the recommended pattern for fetching data.

We're not duplicating these properties onto location, nor are we going to mutate the location object supplied by history – doing so is an anti-pattern.

[FredericHeem]

Unfortunately, these 2 packages don't suit my requirements because fetching the data is coupled with the component lifecycle in these 2 cases.
How can we access the routes and the params inside a redux middleware ? This would be very useful.