lyntin 4.2 - last call for changes

Hi!

I didn't get very far with Lyntin 4.2 as far as I can tell.  Also,
there wasn't a whole lot of conversation surrounding what fixes Lyntin
4.2 should have.

The current changelog is something like this:

 - added a session_change_hook (thanks Tuomas)
 - fixed line regexp to use finditer instead of split--much
   faster
 - fixed the read command to use HTTPResponse and HTTPConnection
   objects
 - changed the if_cmd to use python syntax rather than c syntax
   for &&
 - added handling for horizontal tabs
 - added additional loop_cmd sytnax:

     #loop {tom,pete,harry} ...

   allowing it to loop over strings
 - moved the UI to the main thread
 - added catching of EINTER in cursesui
 - updated to GPL 3
 - changed setup.py to use setuptools

I think that's it.  Most of the work here was done in 2004 and 2005
and has been sitting around since then.

Should anything else go in?  Last call for changes.

/will

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