fix some bug

1、update readme
2、add guzzle require

artisan command compatible with Linux only

to many issues with sed command differences.

more compatible

v2.0.3

works now

Compatability

works with Laravel 5.3 - also sed updated for Linux and Mac OSx

Documentation

Readme updated to clarify install requirements.

Simplified Install and Updates

• artisan command for adminer.php script download (only if not latest version)
  -- The adminer.php script is now automated download from latest
  -- auto reformat of adminer.php to replace duplicate (already declared) functions
  -- command will run with composer install and/or update
• auto middleware by default
  -- optional adminer configs
• laravel 5.5 auto service provider
• README.md update with all these features.

use middleware

v1.1

update readme