Move scripts dir inside hm

And remove weird path contraptions

hm/scripts/pdfrename

@@ -0,0 +1,51 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash --pure
+#! nix-shell -p bash pdftk coreutils
+
+# Change the title of a PDF file
+
+if [[ -z "$1" || -z "$2" ]]; then
+    echo "Usage: $0 FILE TITLE [CREATOR [PRODUCER]]"
+    echo
+    echo "Arguments:"
+    echo "    FILE     Path to the PDF document"
+    echo "    TITLE    Content of the Title tag"
+    echo "    CREATOR  Content of the Creator tag"
+    echo "    PRODUCER Title to give"
+    exit 1
+fi
+
+file="$1"
+title="$2"
+creator="$3"
+producer="$4"
+
+if [ ! -f "$1" ]; then
+    echo "No such file or directory: $1" >> /dev/stderr
+    exit 2
+fi
+
+instructions=$(mktemp)
+
+echo "InfoBegin" >> "$instructions"
+echo "InfoKey: Title" >> "$instructions"
+echo "InfoValue: $title" >> "$instructions"
+if [ -n "$creator" ]; then
+    echo "InfoBegin" >> "$instructions"
+    echo "InfoKey: Creator" >> "$instructions"
+    echo "InfoValue: $creator" >> "$instructions"
+fi
+if [ -n "$producer" ]; then
+    echo "InfoBegin" >> "$instructions"
+    echo "InfoKey: Producer" >> "$instructions"
+    echo "InfoValue: $producer" >> "$instructions"
+fi
+
+copy=$(mktemp)
+cp "$file" "$copy"
+
+pdftk "$copy" update_info "$instructions" output "$file"
+
+rm "$instructions" "$copy"
+
+