[int, str, NoneType etc].__module__ is "__builtin__", not "builtins"
Handle "--multiprocessing=-1" case

If "--multiprocessing" is passed a negative number, the number of
workers is determined based on "multiprocessing.cpu_count()".
Handle case where there is no multiprocessing
Move cpu_count() call to after import check
Document the negative "--processes" case
Add test case with negative "--processes" value

This should result in automatic selection of processes based on CPU
count rather than hanging.
Remove redundant code
Bugfix for the issue #109: Fails to properly parse NOSE_COVER_PACKAGE environment variable.
Now the following line works correctly:

os.environ['NOSE_COVER_PACKAGE'] = 'package1,package2,package3'
Suppress tracebacks caused by ConfigErrors.

Show a kind error message instead of a traceback
when an unknown configuration variable is found in
a file.
allow building docs to HtmlHelp and other embedded builds.
test_xunit: Replace an embedded tab with spaces
test_utils: add some edge cases to test_test_address
Format captured log records immediately to have consistent formatting of mutables.

This is a fix for https://github.com/nose-devs/nose/issues/561
Merge pull request #517 from myint/cpu_count

Handle "--processes=-1" case
Merge pull request #560 from jszakmeister/remove-tab

test_xunit: Replace an embedded tab with spaces
test_address: detect builtins correctly on Python 2.x and 3.x
xunit: capture stdout out into the system-out tag

Change the score of Xunit to place it before the Capture plugin.  We
don't want the Capture plugin to change the streams before the tests are
run.  At a score of 2000, that's exactly what happens, so let's make it
499 instead (Capture's score - 1).

Have Xunit replace the stream with a Tee object of just swapping the
stream.  This allows the Capture plugin to see the data from stdout,
even though we've replaced the stream, allowing it to function exactly
as you would expect it to.

Finally, we maintain a stack of streams, instead of just a single
stream.  I don't believe this is entirely necessary though.
Adjust the ordering to leave Xunit earlier in the process.
xunit: add the flush method to the Tee class
xunit: tee stderr as well

This should help improve the overall experience with automated test
environments, such as Jenkins and QuickBuild.