lib/solr4r/builder.rb: Refactored.
lib/solr4r/client.rb (json_query): New method.
lib/solr4r/{document,result}.rb: New wrapper classes.
Rakefile: ruby-nuggets has been renamed to nuggets.
lib/solr4r/uri_extension.rb (RequestUriExtension#with_params): Use CGI.escape to escape query params.
README: github.{io -> com}.