Regexp for 'documents' should also support docx

[kanduvisla]

Now the regexp for 'documents' is:

/\.(?:doc|pdf|rtf|txt)$/i

but this should be:

/\.(?:doc|docx|pdf|rtf|txt)$/i

(perhaps there are also some more filetypes to add to this regexp?

[michael-e]

Isn't it rather simple to add new doctypes? So why should we bloat the default? (Most if the time I even reduce it to only accept PDF.)

[designermonkey]

I agree Michael. I can see why adding to the default would be nice, to avoid repetitive typing, but it's not a big requirement IMO.

[nickdunn]

Because doc is now esdentially deprecated and has been superseded by docx. I don't consider this bloat at all...it makes it more useful. Smart defaults make for an easier life.

[nickdunn]

Not a big requirement but I think a requirement nevertheless.

[michael-e]

Well, OK then! If you like it, let's do it.

[nickdunn]

Pull request sent. Included in this commit.