adding win32api requirement for windows
fixing bug in internal mapping of network adapter names on Windows
adding some small tests
skipping data/error tests on windows (for now)
adding missing reason to test skips
adding fallback search for older WMI implementations
adding windows specific tests for error/data io
fixing import for Python 2.6
being less explicit with attribute check due to differences with Windows XP
adding environment variable for root logger level
adding some internal logging for the secondary search
fixing an internal logic typo
Merge pull request #23 from pyfarm/windows_fixes

fix windows specific bugs in sysinfo.network