Better definition of checkout times with dynamic prices

Problem/Motivation

The hotel manager wants a definition of the check-in time slot for each reservation. To obtain this, he is willing to give the customer a discount if the check-in is carried out during the most convenient time slots for the hotel.

Hypothesis

A). a BeeHotel PriceAlterator (manager defines discount per timeslot, guest selects preferred time slot i the search form, the matching discount is applied )
B). a new step is added in the checkout process

User interface changes

A). A new form element is added to the unit search form
B). The checkout process has a further step where user selects time slot and the price changes

Data model changes

A). Every BeeHotelUnit has a list of timeslot. IE:

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Golden Room
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