[os] missing module public root()

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
[os] path.split

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
[os] os.path is a bit smarter now

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
adding camelCase to os.path methods

To conform with qml style

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
[os] os.path.isSame()

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
unit tests for os

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>
version bump

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jollamobile.com>