Few commits

[cm...@yahoo.com]

Hi,

I'll start doing a number of commits that implement part of what was
proposed so far. Please review.

( the tree may be unstable - I'll try to send individual commits instead
of a big one ).

One of the changes that wasn't discussed so far - in Ajp13.java I
reproduced some of the changes from the standalone module. That results in
almost 50% increase in speed, and the changes are pretty minor ( just the
use of MessageBytes and OutputStream instead of Strings - it's fascinating
how a small change can have such an effect ! ). 

Costin