Merge pull request #1404 from stevepiercy/master

- add missing step for tox setup
Remove unnecessary call to get_current_registry in NullRendererHelper
Change helloworld to myapp

Fix a typo in the documentation.

Closes #1408
Merge pull request #1409 from bertjwregeer/patch-1

Change helloworld to myapp
fix typo

Re: https://github.com/Pylons/pyramid/pull/1411/files