Release 0.1.17

- `set -u` doesn't permit bash arrays to test -n (bug 1319987)
- export unbound variable DIB_RHSM_USER (bug 1318717)
- build raw image in separate tmpfs (bug 1289582)
- ensure we can read the kernel out
- ensure scripts are set -u
- fedora: add support for configuring Yum mirrors
- add map-services for debian distros
- remove the temporary deploy element after rename
- add switch to turn on caching for debian element
- move instead of copy the temporary git manifest