Loggerhead reviews + broad plan

[Ian Clatworthy]

Hi all,

I've made some good progress this week getting my head around the 
Loggerhead code base and base technologies, WSGI/Paste and ZPT. I'm 
hoping to start reviewing and landing the numerous outstanding patches 
next week, if others don't beat me to them. :-)

In terms of technical direction, I'm planning to:

* leave the current dependencies as is for 1.18
* require Chameleon instead of simpleTAL for 2.0.

More broadly, stability patches and low-risk bug fixes will go into 1.18 
and other patches will go into 2.0.

Chameleon is a faster implementation of ZPT than simpleTAL, as 
illustrated by Kapil's branch porting Loggerhead to it. Together with 
some more intelligent caching of the revision graph that John is working 
on, I'm hoping Loggerhead 2.0  + bzr 2.2 will be notably faster than 
Loggerhead 1.17 + bzr 2.1.

Ian C.