Add a test target for rake

Rakefile

@@ -1 +1,13 @@
 require "bundler/gem_tasks"
+
+require 'rake/testtask'
+
+Rake::TestTask.new(:test) do |test|
+  test.libs << 'lib' << 'test'
+  test.pattern = 'test/*_test.rb'
+  test.verbose = true
+end
+
+#task :test
+#
+#task :default => :test