minor improv in C++'s ruby_compare_lessthan_proc

Apparently creating procs can be a performance hit
[http://mudge.name/2011/01/26/passing-blocks-in-ruby-without-block.html],
so let's not do it and use yield.

No noticeable speed change, but this is cleaner anyway.
sunflower version bump
retrieve all revisions, not just the first 500. fixes #1
handle everything on root path to be able to run as CGI script
use wiki indentifier instead of wikipedia language code