Conflicts:
	.gitignore
	setup.py
	src/zc/buildout/buildout.py
	src/zc/buildout/download.py
	src/zc/buildout/easy_install.py
	src/zc/buildout/testing.py
	src/zc/buildout/tests.py

Add referred parts' hash strings in __buildout_signature__, that invokes rebuild of a part when one of its (recursive) dependencies are modified.

Also remove duplicates and sort entries in __buildout_signature__.

       buildout-2-compatible recipes weren't expressed correctly,
       leading to unintendional use of zc.recipe.egg-2.0.0a3.

can't release them to pypi anymore.

zc.recipe.testrunner past version 1

itself past version 1.

Versions in versions sections can now be simple constraints, like
<2.0dev in addition to being simple versions.

Make sure (???) buildout doesn't downgrade due to defer-final

This patch give ability for Options instances to support set objects
as values.
It define __eq__ to avoid calling the fallback method defined in UserDict upper class
ie: UserDict.__cmp__
(cherry picked from commit 4ca599db4e4dfe7f830747dce89d066a0d5d468f)
Signed-off-by: Cédric de Saint Martin <cedric.dsm@tiolive.com>