Add custom Logger

spec/logger_spec.rb

@@ -0,0 +1,11 @@
+require "spec_helper"
+
+describe Crono::Logger do
+  describe "#initialize" do
+    it "should initialize logger" do
+      expect {
+        Crono.logger.info("Test")
+      }.to_not raise_error
+    end
+  end
+end