Various updates

New devices:
-Huawei Mate S
-Moto X 2015 Pure
-Moto MAXX
-Samsung Galaxy J1 Ace
-Samsung Galaxy Xcover 3

Fix up Oppo R819 page
Remove incorrect author on recent version notes

Change-Id: I06b270648b18503f3b897ad611e7c6972e799d46
diff --git a/_devices/samsunggalaxyxcover3.markdown b/_devices/samsunggalaxyxcover3.markdown
new file mode 100644
index 0000000..dab6494
--- /dev/null
+++ b/_devices/samsunggalaxyxcover3.markdown
@@ -0,0 +1,25 @@
+---

+layout: device

+title:  "Samsung Galaxy Xcover 3"

+codename: xcover3ltexx

+downloadfolder: xcover3ltexx

+supportstatus: Current

+maintainer: Dees_Troy

+oem: Samsung

+ddof: "/dev/block/platform/soc.2/by-name/RECOVERY"

+devicetree: "https://github.com/TeamWin/android_device_samsung_xcover3ltexx"

+---

+

+{% include disclaimer.html %}

+

+{% include supportstatus.html %}

+

+{% include appinstall.html %}

+

+{% include download.html %}

+

+{% include twrpinstall.html %}

+

+{% include odininstall.html %}

+

+{% include ddinstall.html %}