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