Starts reprounzip-docker plugin
Use apt-get on Debian as well (not aptitude)
Work in progress
Adds --base-image to 'reprounzip docker'
Merge branch 'master' into 'docker'

Conflicts:
	reprounzip/reprounzip/unpackers/common.py
Adds Debian 8 'Jessie' to recognized Docker images
Working on docker setup/run/upload/... commands
Fixes the packer failing on temporary directories

In addition to the configuration file, the packer also reads the trace
to pack directories in which files were created or that were used as
working directory of processes. However these might have been temporary
directories that no longer exist; in this case, an OSError really
shouldn't be allowed to propagate.
Bumps reprozip version to 0.3.1
Makes sure pip calls setup.py scripts correctly
MANIFEST.in: include header files in sdist

[skip ci]
Merge branch 'v0.3' into 'master'

Conflicts:
	CHANGELOG.md
	reprozip/MANIFEST.in
Fixes download_file() failing when using its cache
Makes 'script.sh' files executable

For the 'directory' and 'chroot' unpackers, these files should probably
be executable.
Restores shared files
Adds buildpkgs.py script
Fixes 'directory' script.sh having two PATHs

The new computed PATH variable was appended instead of replacing the
PATH in the original environment.
PATH for 'directory' goes in and out of dir

If the original PATH was '/usr/bin:/bin', we would previously use
'mydir/usr/bin:mydir/bin'. We now use
'mydir/usr/bin:mydir/bin:/usr/bin:/bin'.
Factors should_restore_owner()
'chroot' and 'directory' extract config to target