[Ruby] Minor nit with hoe

[Timothy J. Wood]

   I'm using 1.1.6:

% rake release
... blah blah blah ...
Must supply VERSION=x.y.z
rake aborted!
Must supply VERSION=x.y.z

   But, I already had to define VERSION as a module variable (in fact  
it just got read when building the gem), so I'm not sure why I need  
to define it in the environment to run the release task.

   Defining it in the environment allows me to connect connect to  
rubyforge, but then I get some error, presumably due to miss- 
configuration on my part, having never done this before :)

-tim