install scripts (dennis)
    
    - Merge #242 `Fix wrong file permissions` (ausil)
    - Add a utility to validate config (lsedlar)
    - [variants] Stop printing stuff to stderr unconditionally (lsedlar)
    - Fix atomic/ostree config validations (lsedlar)
    - [pungi-wrapper] Remove duplicated code (lsedlar)
    - [checks] Add a check for too restrictive umask (lsedlar)
    - [util] Remove umask manipulation from makedirs (lsedlar)
    - Merge #240 `Filter variants and architectures` (ausil)
    - Filter variants and architectures (lsedlar)
    - Refactor checking for failable deliverables (lsedlar)
    - [buildinstall] Do not crash on failure (lsedlar)
    - Reuse helper in all tests (lsedlar)
    - [atomic] Add atomic_installer phase (lsedlar)
    - [ostree] Add ostree phase (lsedlar)
    - [atomic] Add a script to create ostree repo (lsedlar)
    - Merge #232 `Improve logging by adding subvariants` (ausil)
    - Add compose type to release for images (lsedlar)
    - [image-build] Add traceback on failure (lsedlar)
    - [image-build] Use subvariants in logging output (lsedlar)
    - [live-media] Use subvariants in logging (lsedlar)
    - Add tracebacks to all failable phases (lsedlar)
    - ppc no longer needs magic bits in the iso (pbrobinson)
    - [buildinstall] Add more debugging output (lsedlar)
    - [metadata] Stop crashing on empty path from .treeinfo (lsedlar)
    - [checksums] Add label to file name (lsedlar)
    - [buildinstall] Use customized dvd disc type (lsedlar)
    - image_build: fix subvariant handling (awilliam)
    
    Signed-off-by: Dennis Gilmore <dennis@ausil.us>