use activesupport not unicode_utils

carmen.gemspec

@@ -20,5 +20,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency('nokogiri')
   s.add_development_dependency('rake', '0.9.2.2')
   s.add_development_dependency('debugger')
-  s.add_dependency('unicode_utils', '~> 1.4.0')
+  s.add_development_dependency('i18n')
+  s.add_dependency('activesupport', '~> 3.0.0')
 end

lib/carmen/querying.rb

@@ -1,4 +1,4 @@
-require 'unicode_utils'
+require 'active_support/core_ext/string'
 
 module Carmen
   module Querying
@@ -32,12 +32,12 @@ def coded(code)
     def named(name, options={})
       case_fold = !options[:case] && name.respond_to?(:each_codepoint)
       # These only need to be built once
-      name = case_fold ? UnicodeUtils.casefold(name) : name
+      name = case_fold ? name.mb_chars.downcase.normalize : name
       # For now, "fuzzy" just means substring, optionally case-insensitive (the second argument looks for nil, not falseness)
       regexp = options[:fuzzy] ? Regexp.new(name, options[:case] ? nil : true) : nil
 
       query_collection.find do |region|
-        found_literal = name === (case_fold && region.name ? UnicodeUtils.casefold(region.name) : region.name)
+        found_literal = name === (case_fold && region.name ? region.name.mb_chars.downcase.normalize : region.name)
         found_literal || options[:fuzzy] && regexp === region.name
       end
     end