Automatic monkey patching, workaround for Odoo 10 issue, and tests!

[sbidoul]

• [x] automatic monkey patching for Odoo 8 and 9
• [x] automatic workaround for https://github.com/acsone/setuptools-odoo/issues/10 and https://github.com/acsone/setuptools-odoo/issues/18
• [x] deprecate *-autodiscover scripts
• [x] all use cases I could think of are tested for Odoo 8, 9, 10
• [x] update doc and changelog
• [x] pypi release with travis