Fixed homepage link

The link was pointing to a page that said:

This page has been moved to http://iverilog.icarus.com, you will be forwarded there automatically in 3 seconds.
Please update your links.

So now it's updated
Merge pull request #10 from kiteflyingmonkey/patch-1

Fixed homepage link
Merge branch 'master' of git://github.com/steveicarus/iverilog