refs #5 some option fix.

- I want to use "-h" to --help. --host is minor option.
- I need -E option for other environment's task running.

lib/rrails/client.rb

@@ -20,7 +20,9 @@ class Client
     def self.opts_parser(options = {})
       opts = OptionParser.new
       opts.banner = 'Usage: rrails [options] [[--] commands]'
-      opts.on('-h', '--host=s', 'RRails server hostname. Default value is "localhost".')      {|v| options[:host] = v }
+      opts.on('-h', '--help', 'This help.')      {|v| options[:help] = v }
+      opts.on('--host=s', 'RRails server hostname. Default value is "localhost".')      {|v| options[:host] = v }
+      opts.on('-E', '--rails_env=s') {|v| options[:rails_env] = v }
       opts.on('-p', '--port=i', 'RRails server port. Default value is decided from RAILS_ENV.')      {|v| options[:port] = v }
       opts.on('-t', '--[no-]pty', "Prepare a PTY. Default value is decided by commands.")      {|v| options[:pty] = v }
       return opts
@@ -38,7 +40,8 @@ def self.new_with_options(argv)
     def initialize(options={})
       @cmd = options[:cmd] || ""
       @host = options[:host] || 'localhost'
-      @port = options[:port] || DEFAULT_PORT[ENV['RAILS_ENV'] || 'development']
+      @rails_env = options[:rails_env] || ENV['RAILS_ENV'] || 'development'
+      @port = options[:port] || DEFAULT_PORT[@rails_env]
       @use_pty = options[:pty]
       if @use_pty.nil?
         # decide use_pty from cmd

lib/rrails/server.rb

@@ -79,6 +79,7 @@ def boot_rails
     end
 
     def dispatch(sock, line, pty=false)
+
       if pty
         m_out, c_out = PTY.open
         c_in = c_err = c_out