Merge pull request #1593 from bf4/rake_with_warnings

Always be warning

Author: remear

Rakefile

@@ -41,8 +41,9 @@ require 'rake/testtask'
 
 Rake::TestTask.new do |t|
   t.libs << 'test'
+  t.libs << 'lib'
   t.test_files = FileList['test/**/*_test.rb']
-  t.ruby_opts = ['-r./test/test_helper.rb']
+  t.ruby_opts = ['-w -r./test/test_helper.rb']
   t.verbose = true
 end