Fixes another bug related to the formatting code refactoring in 3.1.7
  Fixes ticket:99, and adds Henrik's unit test (with minor modifications)
  Fixes ticket:102.
    Fix provided by kevinj -- thanks!  Great job.
  Implements namespace validation in the baseparser.  This means that, as per
    the XML namespace spec, unbound prefixes generate UndefinedNamespaceException.
    Also, as per the namespace spec, the 'xml' prefix must be bound to 
    http://www.w3.org/XML/1998/namespace, and the 'xmlns' prefix must not be declared. 
    in the XML.
  Fix for ticket:115
  Fixes a bug in the pretty printer related to an incomplete refactoring.
  Merge code cleanups
  Fixes another bug related to the formatting code refactoring in 3.1.7
  Indentation fix.
  lib/rexml/formatters/*.rb: set properties.
  lib/rexml/encodings/{ISO-8859-15,CP-1252}.rb: fixed invalid syntax.
  lib/rexml/rexml.rb: removed doubled constant.
  lib/rexml/rexml.rb: added encoding.
  Fixes ticket:110
  Missing include for UndefinedNamespaceException was causing errors in some
    cases.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@13815 b2dd03c8-39d4-4d8f-98ff-823fe69b080e