Jemi progress, part 4

I fixed the history - a working back button is a big win. I fixed the location bar.

Bug list: no wait cursor after clicking a link; relative links sometimes go to wrong place (or do they?); links with a port number don't work right; not handling external links - HTTP, etc; non-text responses... should what?
Feature requests: bookmarks; cope with badly formatted response header (quite a few of those - gives server authors a hard stare); history; context menu; visited link colour; user-defined colours, fonts, etc Edit: gopher protocol, because it's a piece of cake