Fixed several tiny typos.

This is weird, platform.python_version_tuple() returns a tuple of ints
on Python 2.6 on windows.

added conditional section documentation

Fixed the conditional-section example and added a test for it.

Added some more details about option overridding.

       exist in that branch).  I don't really expect people to use
       conditional sections with parse, but behavior should be
       consistent.

Updating the master version to dev: should we increment the version while in dev?

Jim meta recipes

Empty "eggs=" interpreter fix. Fixes #79

Removed buildout.dumppickedversions from the warning. Partial fix for #70

Warn when using an outdated bootstrap that gives you setuptools, fixes 82

zc.recipe.egg:develop docs fix path -> setup

Fix for #73: proper sys.exit code when restarting buildout

Fixing docstring incorrect reference to obsolete command line options

Add support to ignore sections conditionally based on a Python expression.

Fixes https://github.com/buildout/buildout/issues/94

Add bin/buildout --version

A restarted project's exit code is now properly propagated. This makes
buildout more reliable in automatically-run situations.

When the process is restarted (and results in an error),
we can now properly check the exit code that comes out of
the 'root' buildout process.

The required option is actually 'setup' not 'path'.

Reworded the warning.

Fixes #82

Thanks Marius Gedminas for the fix I could copy/paste :-)

Note that there is no test for this as the test setup doesn't allow for it.
The error that this commit fixes, fixes an error that occurs at
easy_install.py import time, so the fix also has to be on that level, making it
hard to test.
I personally think it's ok like this... ;-)

I *have* retained buildout.dumppickedversions in the doctest with
the qualification 'only part of it'.

Removing the warning *does* make it less obvious for the people
that use buildout.dumppickedversions in the way I thought it
was used most, but apparently the default behaviour of dumppickedversions
was otherwise.