[IMP] start to add an the support customer display and start to add the abstract class for the driver
[REF] start to reorganize the code to be more modular
[REF] remove useless code
[REF] move the display route inside the plugin
[REF] use plugins instead of libraries
[REF] extract main page into views.py, refactoring in progress
[REF] extract odoo7 POS API into the plugin odoo7
[REF] extract odoo8 POS API into the plugin odoo8
[REF] continue refactoring ;). Now all cups code is in the cups plugins
[REF] extract escpos driver, add a todo for contributing the code into official lib, fix some pep8
Merge pull request #1 from akretion/refactor

Refactor