Please fix also the other translation errors:

```/var/lib/jenkins/jobs/ftw.blog-jin_byline-test-plone-4.2.x.cfg/workspace/ftw/blog/browser/blog.pt:58:68:
-WARNING- - i18n:translate missing for this:
"""
Roland Barthes
"""

/var/lib/jenkins/jobs/ftw.blog-jin_byline-test-plone-4.2.x.cfg/workspace/ftw/blog/browser/blog.pt:107:26:
-WARNING- - i18n:translate missing for this:
"""
Tag
"""

/var/lib/jenkins/jobs/ftw.blog-jin_byline-test-plone-4.2.x.cfg/workspace/ftw/blog/browser/entry.pt:49:16:
-WARNING- - i18n:translate missing for this:
"""
Tag
"""

/var/lib/jenkins/jobs/ftw.blog-jin_byline-test-plone-4.2.x.cfg/workspace/ftw/blog/viewlets/blog_byline.pt:12:50:
-WARNING- - i18n:translate missing for this:
"""
Roland Barthes
"""
```