issue #64 do not use $rcmail_config

Author: mike-kfed

README.md

@@ -34,7 +34,7 @@
 #### manual:
 
 1. unpack to plugins directory
-1. add `, 'thunderbird_labels'` to `$rcmail_config['plugins']` in roundcubes `config/config.inc.php`
+1. add `, 'thunderbird_labels'` to `$config['plugins']` in roundcubes `config/config.inc.php`
 1. rename `config.inc.php.dist` to `config.inc.php`
 1. if you run a custom skin, e.g. `silver` then you should also symlink or copy the skins folder
    of the plugin to the corresponding skins name, for the example given:

config.inc.php.dist

@@ -1,14 +1,14 @@
 <?php
   // whether to globally enable thunderbird labels
-  $rcmail_config['tb_label_enable'] = true;
+  $config['tb_label_enable'] = true;
   // add labels to contextmenu (if contextmenu plugin is present)
-  $rcmail_config['tb_label_enable_contextmenu'] = true;
+  $config['tb_label_enable_contextmenu'] = true;
   // enable kb shortcuts (1-5)
-  $rcmail_config['tb_label_enable_shortcuts'] = true;
+  $config['tb_label_enable_shortcuts'] = true;
   // users can modify labels
-  $rcmail_config['tb_label_modify_labels'] = true;
+  $config['tb_label_modify_labels'] = true;
   // style for UI: 'bullets' or 'thunderbird'
-  $rcmail_config['tb_label_style'] = "bullets";
+  $config['tb_label_style'] = "bullets";
   // custom hidden flags
-  $rcmail_config['tb_label_hidden_flags'] = array();
+  $config['tb_label_hidden_flags'] = array();