Merge pull request #4 from nferch/master

Bugfixes and logging enhancements
Updated gemspec, relese 0.2.1
added --version
Use lzma for better compression
Keep core duck configuration small

 - Extended configs can add other functionality
Merge pull request #5 from spotify/master

Use lzma for better compression
Fix typo
Only run busybox-links fix on post-packages-configure
Minor tweaks

 * Duck can be used for things other than installations
 * Don't execute sleep unecessarily
Use sh for init scripts

 * Slightly faster
 * Consistent with debian init scripts
Re-add python-argparse as a dep, since duckdb uses
Merge pull request #6 from spotify/master

Cleanup tweaks
Set hostname via DHCP instead of DNS
Modifications to cleanup

 * Keep the necessary parts of apt/dpkg to allow use of apt tools
 * Man and info pages are < 1MB uncompressed, so might as well keep
 * No need to keep the /boot directory around
Merge pull request #7 from spotify/master

Setting the hostname and cleanup improvements
More documentation on --help and more in duck.yaml
rm sources; moved to spotify-installer
chmod some installed scripts
remove services section; moved to spotify-installer
clear_fixes should only run after final