* MainPage.xaml.cs - vars rename

Signed-off-by: Daniel Pawłowski <danielpawlow@gmail.com>
OneDrive API updates:
*OneDriveSyncPage.xaml.cs - removed buggy code
*Common/OndeDriveManager.cs - added with directory creation

Signed-off-by: Daniel Pawłowski <danielpawlow@gmail.com>