OSUtil class created, main paths are added
(cherry picked from commit 7e9d028)
OSUtil class created, main paths are added
(cherry picked from commit c37df03)
OSUtil class created, main paths are added
(cherry picked from commit 9d60ef7)
"src/..." paths related to OSUtil
Merge pull request #112 from rostafiychuk/winsupport

OSUtil and related refactoring
tests ordered; update, resume-instance-level cases added