add script to create an initial admin user

lib/postal/user_creator.rb

@@ -0,0 +1,34 @@
+require 'highline'
+
+module Postal
+  module UserCreator
+
+    def self.start(&block)
+      cli = HighLine.new
+      puts "\e[32mPostal User Creator\e[0m"
+      puts "Enter the information required to create a new Postal user."
+      puts "This tool is usually only used to create your initial admin user."
+      puts
+      user = User.new
+      user.email_address = cli.ask("E-Mail Address".ljust(20, ' ') + ": ")
+      user.first_name = cli.ask("First Name".ljust(20, ' ') + ": ")
+      user.last_name = cli.ask("Last Name".ljust(20, ' ') + ": ")
+      user.password = cli.ask("Initial Password:".ljust(20, ' ') + ": ") { |value| value.echo = '*' }
+
+      block.call(user) if block_given?
+      if user.save
+        puts
+        puts "User has been created with e-mail address \e[32m#{user.email_address}\e[0m"
+        puts
+      else
+        puts
+        puts "\e[31mFailed to create user\e[0m"
+        for error in user.errors.full_messages
+          puts " * #{error}"
+        end
+        puts
+      end
+
+    end
+  end
+end