update docs

ChangeLog.md

@@ -1,5 +1,17 @@
 # ChangeLog
 
+## 16.2 in-dev
+
+* General Changes:
+  * nanodroid-overlay Script
+     * add `-U`, `--update-apks` switch to nanodroid-overlay script, downloads and installs latest versions of custom NanoDroid apks, requires Busybox to be installed (for wget applet)
+         * Fake Store
+         * Play Store
+         * MPV
+         * OpenLauncher
+* Updates (manual)
+  * Play Store (8.9.24)
+
 ## 16.1.20180209
 * Bug Fixes:
   * Full, microG packages

doc/NanoDroidOverlay.md

@@ -126,3 +126,14 @@ many apps have the permission to read the clipboard for no reason, with this you
 `-b`, `--boot-count`
 
 show how often the device was booted; requires Anroid 7.0 or newer
+
+### Update custom APKs
+
+`-U`, `--update-apks`
+
+update custom NanoDroid apks:
+
+* Fake Store
+* Play Store
+* MPV
+* OpenLauncher