Add Official Support for Zenfone 6 2019.

Change-Id: I6efefc1f9fbf5ca14f890a534a46372843e9d728
diff --git a/_asus/asuszenfone62019.markdown b/_asus/asuszenfone62019.markdown
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+---
+layout: device
+title: "ASUS ZenFone 6 2019"
+codename: I01WD
+oem: Asus
+downloadfolder: I01WD
+supportstatus: Current
+maintainer: bigbiff,Dees_Troy
+devicetree: https://github.com/TeamWin/android_device_asus_I01WD
+xdathread: "https://forum.xda-developers.com/zenfone-6-2019/development/tool-utility-twrp-3-3-1-0-teamwin-t3963876"
+---
+
+{% include disclaimer.html %}
+
+{% include supportstatus.html %}
+
+{% include dmverity.html %}
+
+{% include appinstall.html %}
+
+{% include download.html %}
+
+<div class="page-heading">Installation</div>
+Please unlock your bootloader according to instructions documented <a href="https://www.xda-developers.com/asus-zenfone-6-bootloader-unlock-tool-kernel-source-code/">here</a>
+
+Next download twrp-installer-fastboot-3.3.1-0-I01WD.img and do
+<pre>
+fastboot boot twrp-installer-fastboot-3.3.1-0-I01WD.img
+</pre>
+
+This will allow you to install the permanent version. Download the latest image from the download mirros specified above. Next use MTP to put it on /sdcard/.
+
+Once the image is on the phone, go to Install->Install Image and select the image you pushed to /sdcard/. TWRP will repack your ramdisk and permanently install
+the image to your boot_a and boot_b partition. Currently there is no official support for an installer zip to perform these actions.