lineageos_updater: LineageOS cm-14.1 branch for background

Track changes from cm-14.1 branch, as this is where the changes/tweaks happen
Also swap to LineageOS GitHub, as this is where the changes happen

Change-Id: I9405c843ce588613ae8d4da72eeb513f01df421d

templates/base.html

@@ -16,7 +16,7 @@
                     <li>
                         <div class="userView">
                             <div class="background">
-                                <img src="https://github.com/CyanogenMod/android_packages_apps_CMWallpapers/blob/cm-13.0/res/drawable-hdpi/iconoclast.png?raw=true">
+                                <img src="https://github.com/LineageOS/android_packages_apps_CMWallpapers/blob/cm-14.1/res/drawable-hdpi/iconoclast.png?raw=true">
 </div>
                             <a href="#!user"><img class="logo circle" src="https://lineageos.github.io/www/images/logo.png" height=128px width=128px /></a>
                             <a href="#!name"><span class="white-text name">Devices</span></a>