Started removing Forrest build cruft

[Nicola Ken Barozzi <ni...@apache.org>]

I've checked in the first set of mods to the build system to reduce the 
unnecessary copying of files.

This has cut down the build time from 53 to 19 seconds on my machine.

Basically it creates the following dirs in build/:

   build/components -> where the component classes are built
   build/scratchpad -> where the scratchpad classes are built
   build/dist/shbat -> the distro

All Forrest webapp is in

   build/dist/shbat/context/**

All other build/dist/shbat/ files and dirs are for running the forrest 
commands.

Now we need to reduce the source copying.

Jeff, yohooo! If you don't have time now you can send me the things to 
do or just tell me and I'll do them.

Anyway guys, please help and check that all still works. TIA

-- 
Nicola Ken Barozzi                   nicolaken@apache.org
             - verba volant, scripta manent -
    (discussions get forgotten, just code remains)
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