Merge pull request #14 from hvelarde/master

Migrate configlet to plone.app.registry
Update screenshot for readme.
Fix URL to screenshot in readme.
Update raw github URLs.
Show log in testing.

This is usefuly for viewlet testing, since errors are catched and logged.
Install ftw.builder for testing.
Add is_path_included helper function.
Add option to exclude subsites from displaying the status message.
Update German translations.
Update readme: add description of ``Exclude sites`` option.
Update screenshot for readme to include ``Exclude sites`` option.
Merge pull request #16 from 4teamwork/jone-exclude-subsites

Add option to exclude subsites from displaying the message
Update Brazilian Portuguese and Spanish translations