Fix a regression in the previous release that broke downloading metadata for authors witha  double initial such as R. A. Salvatore. Fixes #1294529 [Metadata download fails on author with 2 intials](https://bugs.launchpad.net/calibre/+bug/1294529)
Get rid of the backwards compat code for people running from source that have not updated their binary calibre builds as 1.28 has been out for a while