xF2 Beta Guzzle6 for XenForo 2 1.3.0

• update for XF 2.0.3 - no longer need to modify XF\BbCode\ProcessorAction\AutoLink::fetchUrlHtml - but instead need to update new XF\Http\Reader::getCharset function
• update for XF 2.0.3 - new code in XF\Payment\Stripe
• update for XF 2.0.5 - no longer need to adjust Stripe class
• update for XFMG 2.0.3 - no longer need to extend functionality of XFMG\EmbedData\BaseData\getTitleAndDescription
• update for XFMG 2.0.3 - no longer need to extend functionality of XFMG\EmbedData\YouTube\getTitleAndDescription or XFMG\EmbedData\Imgur\getTitleAndDescription

From v1.1.1 (2018-02-02):

• updates for XF 2.0.2 - XF\Http\Reader ... disable new initListeners functionality since Guzzle6 uses middleware instead of listeners

From v1.2.0 (2018-02-03):

• Support for Media Gallery using Guzzle 6
• Added tests for Media Gallery

• (from 1.1.0) added support for XenForo Elastic Search addon
• (from 1.0.6) bug fix: typo in if statement
• (from 1.0.6) move to develop/release branches - no _output in release and no _data in develop
• (from 1.0.5) vendor/composer/autoload_files.php is only created when required, so don't log an error if the file doesn't exist
• (from 1.0.5) use build.json to automatically run composer install with --no-dev and --optimize-autoloader flags set to get us a clean build of dependencies for production deployment

• bugfix: need to use XF\ConnectedAccount\Http\HttpResponseException

• updates for XF 2.0.1 - XF\Service\AddOn\JsMinifier::request
• updates for XF 2.0.1 - XF\Service\ImageProxy::fetchImageDataFromUrl
• fixes for XF\ConnectedAccount\Http\Client::retrieveResponse - Sending application/x-www-form-urlencoded POST requests requires that you specify the POST fields as an array in the form_params request options (also PUT)
• test routine for Connected Account Client
• change to using \GuzzleHttp\json_decode wrapper rather than native function

• bugfix: missing use statements in Guzzle6\XF\Payment\PayPal; Guzzle6\XF\Payment\Stripe and Guzzle6\XF\Payment\TwoCheckout

• updates for XF 2.0.0 RC2 - changes to XF\SubContainer\Http
• updates for XF 2.0.0 - changes to XF\Service\ImageProxy::fetchImageDataFromUrl()
• Composer classloader changes (from Composer update)

• update for XF 2.0.0 RC1 - changes to XF\Payment\Stripe::validateCallback

• update for XF 2.0.0 beta 5 - mirror changes to XF\Service\ImageProxy::fetchImageDataFromUrl

Changelog:

• update for XF 2.0.0 Beta 3 - fixes for 2.0 beta 3 - now uses captchaIsValid rather than captcha()->isValid()
• added _data and _releases to .gitignore so they aren't included in repo
• (from 0.1.6) update for XF 2.0.0 Beta 1 - mirror changes to XF\Service\ImageProxy::fetchImageDataFromUrl