Renaming Group into BlockGroup + tests + doc
Replacing Hyperlink#as_html self-proclaimed 'quick-and-dirty' code by something cleaner
Support for groups + doc + tests
Updating the changelog for group support
Fixed a test that caused a build error because of a different behavior in Ruby 1.9 strings
Fixing the fix for the string comparison to work on older versions of Ruby
Test was failing depending on content order (which is random); added an ordering
Renamed FragmentList into FragmentMapping
Merge pull request #19 from rudyrigot/group

Support for group fragments