TODO:
- Implement/integrate low level stuff (see BootDrive.h)
- reading the partition table
- reading/writing the MBR
- writing the boot menu
- Open file dialog for selection of backup MBR file
- Write error message in case of I/O errors
- Test
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24689 a95241bf-73f2-0310-859d-f6bbb57e9c96