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#Update path to codeigniter 3

##Commits in sequence for ci3

• Delete system folder
• Add ci 3.1.9 system folder
• Update languages files from github repo (3.1.8 latest) and core/MY_Lang as in repo
• Update your classes file names Upgrading from 2.2.x to 3.0.x - Step 2
• Replace config/mimes.php Upgrading from 2.2.x to 3.0.x - Step 3, merged keys and used short array notation
• Update index.php Upgrading from 2.2.x to 3.0.x - Step 1: Update your CodeIgniter files (index.php)
• Update your Session library usage Upgrading from 2.2.x to 3.0.x - Step 6, also passed through config file to prepare for next updates
• Update your Session library usage 2 Upgrading from 2.2.x to 3.0.x - Step 6 fixes on app
• Update config/database.php Upgrading from 2.2.x to 3.0.x - Step 7
• Update config/routes.php file Upgrading from 2.2.x to 3.0.x - Step 9
• Application updates for ci upgrade replace $this->input->is_cli_request() with is_cli() and ci do_hash() with php hash and system overrides of MY_Url_helper
• Constants update Upgrading from 3.0.1 to 3.0.2
• Update MX for CI3
• Remove MX for CI2
• Remove php 5.6+ polyfill php min requirement of 5.6 makes polyfill import redudant
• Remove FB auth code (keep db table structure? for smile import and merge yo new oauth library?
• Remove facebook/php-sdk-4
• Remove phpmailer/phpmailer to update to version 6 of PHPMailer
  1. 5.2 is for php up to 7
  2. The 5.2 branch will not receive security updates after December 31st 2018
• Install phpmailer/phpmailer v6
• Update core/Mailer class for PHMailer 6.x
• Composer update Ensure we have latest version of components
• Error views for CI3
• Fix composer loading from config and remove leftover in database config
• Fix MX\Loader view loading update codeigniter core extends
• PHP7 fixes for mx and product_category and product model
• Fix overriding of CI Cart class codeigniter 3 override of system class needs class name to be CI<Classname>_
• Fix default controller and cart reading null from session default controller point to method home - fix cart for cart contnets from session being null
• Remove dompdf 0.6 from copy installation
• Composer require dompdf/dompdf (version 0.8.3)
• Replace PHPOffice\PHPExcel with PHPOffice\PhpSpreadsheet remove PHPOffice\PHPExcel and install successor PhpSpreadsheet (PHPExcel is deprecated from 2017 and archived in 2019 - successor is breaking compatibility)
• Use PhpOffice\PhpSpreadsheet for all xlsx outputs
• Replace eregi_replace with preg_replace php7 error
• Remove url_title_rus function from jbimages helper
• Fix typo in adv_product_list_model::getFrontListProducts
• Sessions using file system change sessions from db to filesystem, update gitgnore to exclude session files