Highlight names uniformly

Fix a typo, minor grammar issues

properly close resources

Fixes ``buildout.py:574: ResourceWarning: unclosed file <_io.TextIOWrapper...>```

Highlight option and folder names with backticks, in order to be uniform throughout the document.

[ci skip]

[ci skip]

Fix race condition with working set not reflecting reality during integrity check.

may conflict with new eggs buildout is trying to install.

[ci skip]

[ci skip]

Added sorting of working set used by zc.recipe.egg

[ci skip]

[ci skip]

Install wheels via setuptools, fixes #425

Remove no longer existing winbot

[ci skip]

[ci skip]

Fixed: could not install eggs with case issues

Setuptools 38.2.0 suddenly started supporting and downloading wheels.
.whl files would end up in the non-functioning and deprecated unpack_wheel().
The new default ('just use setuptools') works fine.

- If you use an older setuptools, setuptools won't download wheels and the new
  code won't be used.

- If you use buildout.wheel, you'll overwrite the unpacker anyway.

For instance when sdist file name and package name had different case.

Update implicit-parts.rst