Release 0.1.5

- add support for Debian
- update to Fedora 20
- only configure DHCP for real interfaces (bug 1239479)
- fix kernel/initrd extraction for SUSE based distros
- workaround broken udev update on openSUSE
- setup ccache symlinks on openSUSE
- support list of Red Hat channels and repos
- update default RHEL guest image
- create a new baremetal element (bug 1224669)
- allow use of mirrors when building Ubuntu images
- fix mysql package mappings for opensuse
- fix the curl command in the ironic-deploy element
- support different install types in source-repositories
- wait for tgtd socket to be available
- implement serial-console for systemd