[antlr-interest] download link for STv4

[Yauhen Yakimovich]

Hi Terence,

Could you please update the ST download page somehow, so that that
http://www.stringtemplate.org/download/ will be present there as well.

I was looking for latest ST-4.0b5-src.zip and it took me a while to grasp that

http://www.stringtemplate.org/download/

and

http://www.stringtemplate.org/download.html

are different pages.

Thanks in advance!

-- 
With best regards,
Y.Y.