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/huaweimates.markdown b/_devices/huaweimates.markdown
new file mode 100644
index 0000000..108ea03
--- /dev/null
+++ b/_devices/huaweimates.markdown
@@ -0,0 +1,22 @@
+---

+layout: device

+title:  "Huawei Mate S"

+codename: carrera

+downloadfolder: carrera

+supportstatus: Current

+maintainer: eloygomez

+oem: Huawei

+devicetree: https://github.com/TeamWin/android_device_huawei_carrera

+---

+

+{% include disclaimer.html %}

+

+{% include supportstatus.html %}

+

+{% include appinstall.html %}

+

+{% include download.html %}

+

+{% include twrpinstall.html %}

+

+{% include fastbootinstall.html %}