Add shebangs to bash scripts

To specify used interpreter and set exit on error mode.

CI/teal_ci.sh

@@ -1,4 +1,4 @@
-set -e
+#!/bin/bash -e
 
 docs/source/install_luadocumentor_in_docker.sh
 PATH=$PATH:~/luarocks/bin

docs/source/install_luadocumentor_in_docker.sh

@@ -1,3 +1,5 @@
+#!/bin/bash -e
+
 if [ ! -f /.dockerenv ] && [ ! -f /home/docs/omw_luadoc_docker ]; then
     echo 'This script installs lua-5.1, luarocks, and openmwluadocumentor to $HOME. Should be used only in docker.'
     exit 1