Add initial CLI class

bin/periodicity

@@ -1,7 +1,15 @@
 #!/usr/bin/env ruby
 
-require 'rails'
-require File.expand_path("config/environment.rb")
-::Rails.application.eager_load!
+$LOAD_PATH.unshift File.expand_path("../../lib", __FILE__)
 
-logger.info "Running in #{RUBY_DESCRIPTION}"
+require "periodicity/cli"
+
+begin
+  cli = Periodicity::CLI.instance
+  cli.run
+rescue => e
+  raise e if $DEBUG
+  STDERR.puts e.message
+  STDERR.puts e.backtrace.join("\n")
+  exit 1
+end