Log message:
Bump PKGREVISION of rubygem based packages which contain extention libraries.

Log message:
Update ruby-ferret to version 0.11.6.  Changes from version 0.11.4
include:

+ Install as a Ruby gem.

* Fixed major bug in term vectors which was in turn affecting
  highlighting
* Fixed memory leak in PerFieldAnalyzer
* Fixed range query highlighter
* Fixed memory alignment issues on Solaris
* Added :use_keywords option to query parser so you can now turn
  of keywords so a search for OR will work
* multiple other bug fixes

Log message:
Import ruby-ferret.

Ferret is a high-performance, full-featured text search engine library
written for Ruby.  It is a Ruby port of the Java Lucene search engine.
In the same way as Lucene, it is not a standalone application, but a
library you can use to index documents and search for things in them
later.