As a User, I can launch a request on any reader using a pre-defined date_range option [Continuation]

[gabrielleberanger]

WHY
Currently, only specific readers accept a --date_range parameter (it depends of the source API, that offers it or not).

Such a pre-defined --date_range option can be very convenient, in particular when conducting tests. In this case, you just have to specify --date-range PREVIOUS_WEEK for instance, instead of providing a specific --start-date and --end-date for your request.

HOW
Make the --date_range option available to all readers, including when it is not initially provided by the source API.

Case 1 - If the --date_range option is provided by the source API
Noting to do

Case 2 - If the --date_range option is not provided by the source API
Make the the option available, using the get_date_start_and_date_stop_from_date_range() function (available here). Here is the status of the implementation on readers falling within this scope:

• DCM reader - To be done
• SA360 - To be done
• MyTarget - To be done
• Adobe 2.0 - Implemented
• Search Console - To be done
• Twitter Reader - To be done
• The Trade Desk - Implemented

Also see issue #67 for a description of how each reader handles date parameters.