add missing on_change_section (present in 6.1)

Also, add the on_change_user_id call in the XML field definition
remove user onchange and select salesman from team
pep8
more lint. closes #19
Add dot files and README
Add unit tests
Cleanup flake8 crm_department
Cleanup flake8 analytic_department
Cleanup flake8 sale_department
Cleanup flake8 project_department
Cleanup flake8 invoice_department