- work on windows
- show unified instead of context diff

Change-Id: Id3ce927f9fdc9783ccb927bcac7d921941865023
Reviewed-by: Bill King <bill.king@nokia.com>

It checks against os-dependent lists which will be submitted
in follow-up commits.

Change-Id: Ieb40b19dbd85c30b28062b46320a6ee60ba672af
Reviewed-by: Bill King <bill.king@nokia.com>