Update copyright file and Vcs-browser field

* Update the date on the copyright file that is distributed with Debian
packages
* Update the Vcs-browser field on the control file
* Update the source field on the copyright file
Install Pithos tools
Merge branch 'hotfix-0.15.1' into debian-hotfix-0.15.1
Bump version to 0.15.1~rc1-1~wheezy

Signed-off-by: Christos Stavrakakis <cstavr@grnet.gr>
Merge branch 'hotfix-0.15.1' into debian-hotfix-0.15.1
Bump version to 0.15.1-1~wheezy

Signed-off-by: Christos Stavrakakis <cstavr@grnet.gr>
Merge branch 'hotfix-0.15.2' into debian-hotfix-0.15.2
Bump version to 0.15.2~rc1-1~wheezy

Signed-off-by: Christos Stavrakakis <cstavr@grnet.gr>
Merge branch 'hotfix-0.15.2' into debian-hotfix-0.15.2
Bump version to 0.15.2-1~wheezy

Signed-off-by: Christos Stavrakakis <cstavr@grnet.gr>
Merge branch 'debian' into debian-release-0.16

Conflicts:
	debian/changelog
	debian/copyright