Merge pull request #111 from mikelarre/mrp_operations_extension

[MOD] Unificando vistas
Update mrp_production_workcenter_line_view.xml
Travis tests
README with Travis
[FIX] warning_log: flake8
[FIX] task_delegation_wizard: flake8
[FIX] Travis file
[IMP] Some flake8
[IMP] PEP8
[FIX] Travis
[IMP] product_m2mcategories: New API
Merge pull request #124 from pedrobaeza/8.0-product_m2mcategories_new_api

[IMP] product_m2mcategories: New API
[MOD]