Run all the tests when calling 'rake'

Rakefile

@@ -5,4 +5,6 @@ task :test do
   Dir['test/*_test.rb'].each do |testfile|
   Dir['test/*_test.rb'].each do |testfile|
     load testfile
     load testfile
   end
   end
-end
+end
\ No newline at end of file
+
+task :default => :test