Check box email plugin for rounbcube

Introduction
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This is plugin for roundcube

Install
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Open config/main.inc.php or config/config.inc.php

1- Add the plugin to roundcube $config['plugins'] array like:

$config['plugins'] = array(
    'chbox',
    'archive',
    'zipdownload',
    'jqueryui',
    'filters',
    'userinfo',
    'password',
    'markasjunk2',
    'hide_blockquote',
    'contextmenu',
    'globaladdressbook',
    'newmail_notifier',
    'vcard_attachments',
);

2- Add 'chbox' column to $rcmail_config['list_cols'] array like:

$rcmail_config['list_cols'] = array('chbox','subject','status', 'from', 'date', 'size', 'flag', 'attachment','list_cols');

Testing
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Tested 14.03.2014 on RoundCube 1.0-RC
Tested 24.03.2014 on RoundCube 0.9.5
Tested 31.07.2014 on RoundCube 1.0.1
Tested 30.08.2014 on RoundCube 1.0.2
Tested 23.03.2015 on Roundcube 1.0.3
Tested 23.03.2015 on Roundcube 1.1.0 (UP version to 0.2.4)