Code review comment for lp:~bjornt/lazr-js/buildoutification

This branch makes lazr-js use buildout to handle dependencies, and makes
it possible for LP to use lazr-js as an egg (via an sdist of course).

There are quite a lot of changes in this branch, and there as still a
few unknowns. First of all, don't be fooled by the diff size. It's over
800 lines, but if you remove bootstrap.py and ez_setup.py (which are
simple copies from LP trun), it's down to a more managable 375 lines.

I've moved all the python code that was lying around into the src-py
directory (I used src-py, since we also have js files, which are in
src-js). All of our code is in a lazr.js package, and the form tools are
now in bin/. I modified them to have a main() function, so it's easy to
generate these scripts using buildout.

Please review the setup.py extra carefully. I wasn't quite sure how to
get the javascript files included, but at least it's working now. Maybe
there is some better way of doing it?

Another thing I'm not sure about is the versions specified in
buildout.cfg. I simply copied the versions from LP's buildout.cfg.

I also modified build.py to include the yui when building the javascript
files. It's only included when building the lazr-js widgets. If
bin/build is used to build other javascript files, it's not included.

Not that I haven't bother about explaining how to set up the
download-cache if it doesn't exist. I used LP's one when testing, but I
intend to make sure that we have a special one of lazr. There is
already a branch for it, but I wanted to get this one landed first,
since we don't need to for LP.

See also lp:~bjornt/launchpad/lazrjs-buildout, which is the branch that
makes use of lazr-js using buildout, and removes it from sourcecode/.

--
Björn Tillenius | https://launchpad.net/~bjornt