- really fix file-based BuildRequires
    - Result dir was not honoring --uniqueext=
    - make rpmbuild run under a chroot login shell
    - mock is now noarch due to drop of all binary components
    - add tmpfs plugin (disabled by default)
    - slightly more friendly logs.
    - added '--copyin' and '--copyout' modes
    - added makeChrootPath() method to Root
    - replaced most ad hock usages of .rootdir with makeChrootPath()
    - updated man page && added test cases