Changed to make the $is_home determination on URI instead of the whole U...

I noticed that the $is_home variable was doing a comparison based on a generated server URL, which was not working as expected when running Apache on a non-standard port (8080 in my case). Instead, I changed the comparison logic to be based solely on the URI instead of the full URL.

In reviewing the bugs, I think this might resolve issue #294. 

Thanks for providing such a useful tool.

Cheers,

Daniel James