Merge branch 'slides/md-output-support' into 'master'

pandoc script support for markdown output

See merge request feng/training/material!273

Author: leogermond

pandoc/pandoc_fe.py

@@ -122,6 +122,8 @@ def output_file_name(
 def output_format(extension):
     if extension == "pdf" or extension == "tex":
         return "beamer"
+    elif extension == "md":
+        return "markdown"
     else:
         return extension