Allow users to select a customer in Front End Point Of Sale
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Functionality:
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    * Allow user to set a customer to a pos order in front end views;

Possible improvements and fix:
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    * This module displays all the customers. That can be long to display
      if there are a lot of customers in database; Display only 80 could be a
      solution;
    * Images of customers are loaded each time; Similar behaviour as
      products image management (with cache) could be developped;

NON Covered features:
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    * Possibility to create customers in front end views;
    * Possibility to change price if customer has a list price different as
      the default list price; (Big stuff);
    * Possibility to see if the partner has not the default price list;
    * Possibility to invoice in front-end views;

Copyright, Authors and Licence:
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    * Copyright: 2014, GRAP: Groupement Régional Alimentaire de Proximité;
    * Author:
        * Julien WESTE;
        * Sylvain LE GAL (https://twitter.com/legalsylvain);
    * Licence: AGPL-3 (http://www.gnu.org/licenses/);