Hi,

  one of the most difficult things for me in using pandoc is to learn extensions and remember their names.

I was wondering if it wouldn't be better to rename some of them differently. In particular it would be useful to reverse their names, for example:

+ simple_tables -> tables_simple

+ multiline_tables -> tables_multiline

+ grid_tables -> tables_grid

+ pipe_tables -> tables_pipe

so for example, the output of `pandoc --list-extensions=markdown` would be

```

[OMISSIS]
+table_captions

+tables_multiline

+tables_pipe

+tables_simple

[OMISSIS]

```

and so on for many other. I know this may break things in scripts, but it would simplify the use of extensions a lot in my opinion.

Thanks,

Luca