add shebang and mass_delete

builds/utils/mass_delete

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+temp=$(mktemp)
+ls > $temp
+nvim "$temp"
+
+different=$(ls | cat "$temp" - | sort | uniq -u)
+rm $different
+for i in $different; do
+	printf "rm %i\n" "$i"
+done

builds/utils/mass_rename

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+temp=$(mktemp)
+ls > $temp
+nvim $temp
+results=$(ls | paste -d'|' - $temp)
+
+IFS="
+"
+for i in $results; do
+	before="${i%%|*}"
+	after="${i#*|}"
+
+	[ "$before" != "$after" ] && mv "$before" "$after"
+	printf "%s -> %s\n" "$before" "$after"
+done