Add option -e to set environment

spec/cli_spec.rb

@@ -49,5 +49,10 @@ describe Crono::CLI do
       cli.send(:parse_options, ["--daemonize"])
       expect(cli.config.daemonize).to be true
     end
+
+    it "should set environment" do
+      cli.send(:parse_options, ["--environment", "production"])
+      expect(cli.config.environment).to be_eql("production")
+    end
   end
 end

spec/config_spec.rb

@@ -3,11 +3,13 @@ require "spec_helper"
 describe Crono::Config do
   describe "#initialize" do
     it "should initialize with default configuration options" do
+      ENV["RAILS_ENV"] = "test"
       @config = Crono::Config.new
       expect(@config.cronotab).to be Crono::Config::CRONOTAB
       expect(@config.logfile).to be Crono::Config::LOGFILE
       expect(@config.pidfile).to be Crono::Config::PIDFILE
       expect(@config.daemonize).to be false
+      expect(@config.environment).to be_eql ENV["RAILS_ENV"]
     end
   end
 end