added sh script to get the epubs

ereader_get_epubs.sh

@@ -0,0 +1,16 @@
+#!/bin/ash
+
+if test -f "/mnt/onboard/tldr/all.txt"; then
+    echo "all.txt exists., remove it";
+    rm /mnt/onboard/tldr/all.txt
+fi
+
+wget -nc "https://hub.xpub.nl/chopchop/tl-dr/log-books/all.txt" -O /mnt/onboard/tldr/all.txt
+
+while read line; do
+    if test -f "/mnt/onboard/tldr/$line"; then
+        echo "$line exists."
+    else
+        wget "https://hub.xpub.nl/chopchop/tl-dr/log-books/${line}" -O "/mnt/onboard/tldr/${line}"
+    fi
+done < /mnt/onboard/tldr/all.txt