Functional tests

The reason the server didn't start in travis was because of this error:

```
  File "/home/travis/virtualenv/python2.7.6/lib/python2.7/site-packages/acmeio-0.0-py2.7.egg/acmeio/__init__.py", line 17, in main
    config.scan(ignore='ameio.tests')
  File "/home/travis/virtualenv/python2.7.6/lib/python2.7/site-packages/pyramid-1.5.1-py2.7.egg/pyramid/config/__init__.py", line 930, in scan
    ignore=ignore)
  File "/home/travis/virtualenv/python2.7.6/lib/python2.7/site-packages/venusian-1.0-py2.7.egg/venusian/__init__.py", line 205, in scan
    __import__(modname)
  File "/home/travis/virtualenv/python2.7.6/lib/python2.7/site-packages/acmeio-0.0-py2.7.egg/acmeio/tests.py", line 11, in <module>
    import pika
ImportError: No module named pika
```

`ignore='ameio.tests'` should be `ignore='acmeio.tests'` so that it's possible to install `acmeio` without test dependencies.