Added bash support

templates/bash.tmpl

+#!/bin/bash
+#if $with_license == True:
+# SPDX-License-Identifier: $spdx_license
+#end if
+
+#attr $default_ext = 'sh'
+
+#------------------------------------------
+# $author $yyyy_mm
+#raw
+#
+# Purpose:
+# --------
+#
+# Usage:
+# ------
+#  
+#------------------------------------------
+
+set -e
+
+exit