Code review comment for lp:~gz/bzr/support_OO_flag_installer

So test this changes one needs to run following commands:

make run
python setup.py py2exe

(You need to remove `build` directory before you run py2exe because it keeps a cache of py/pyo files).

So, testing bzr.dev revno 5218 and this branch we have:

bzr.dev:
library.zip = 14 MB
and entire exe folder (just bzrlib w/o tbzr and other plugins) = 19 MB

This branch (with trunk changes merged):
library.zip = 11 MB
and entire exe folder = 17 MB

The numbers from the FAR file manager, so they are not very accurate. So this branch saves about 2-3 MB.