Release 0.1.3

- add support of handling gerrit repositories refs
- add element to modify /etc/apt/sources.list in dib
- unconditionally cache the repositories being fetched with source-repositories
- merge force-text-mode-console into the bootloader script (bug 1260323)
- log unsupported source repository types
- make sure sbin paths are in $PATH
- fix package-mappings for openSUSE
- update login.defs on openSUSE