New variables for {exp:file:entries}

Transferring from Rob Allen from Slack:

Add extra variables to {exp:file:entries} such as {extension} that are available as regular normal {file_field}{url}{/file_field} tag pair

And the ability to output {exp:file:entries} as category archive style?

The ability to output {file_size} in MB’s etc, 1234567 bytes isn’t very customer friendly, 1.2mb is better