set correct content type for zapp files

*.zapp file is `application/x-tar`
now it will be set correctly on `deploy`
will also force `application/json` for job description json file
Merge pull request #155 from pkit/content_type

set correct content type for zapp files
setup: remove version from swiftclient dep

As far as we know, there's no particular reason to pin zpm to depend on
python-swiftclient>=2.1.0. Any version should suit our purposes.
Merge pull request #159 from larsbutler/fix-swiftclient-dep-version

setup: remove version from swiftclient dep
debian/changelog: update for the 0.2 release pkg

This is meant for packaging the 0.2 tag
(81505fade42134e249cfe410125097820cc8e8b5).
debian: 0.2.1-1 package update

Includes all of the fairly minor bugfixes since 0.2. Also includes the
python-swiftclient dependency (which wasn't present in the package
before).
Merge pull request #162 from larsbutler/deb-pkg-0.2.1

Debian package for 0.2.1