helloworld module tryton2.8

## Im trying to get a grip on development for tryton 2.8
## here is a basic helloworld module displaying a menu item in the tryton client
## you may have to restart the tryton server after changing some code


helloworld/__init__.py ##
##########################
from trytond.pool import Pool
from .helloworld import *


def register():
    Pool.register(
        Hello,
        module='helloworld', type_='model')

helloworld/tryton.cfg ##
########################
[tryton]
version=2.8.0
depends:
  ir
  res
xml:
  helloworld.xml


helloworld/helloworld.py ##
###########################
from trytond.model import ModelView, ModelSQL, fields

__all__ = ['Hello']


class Hello(ModelSQL, ModelView):
    "Hello World"
    __name__ = "hello.hello"


helloworld/helloworld.xml ##
############################
<?xml version="1.0"?>
<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
this repository contains the full copyright notices and license terms. -->
<tryton>
    <data>
        <menuitem name="Hello World" id="menu_hello_world" sequence="10"/>
    </data>
</tryton>