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

@@ -1,3 +1,5 @@
+#!/bin/sh
+
 temp=$(mktemp)
 ls > $temp
 nvim $temp