[backend] fix hostlabel constraints merging
[backend] support newer versions of lxc
[backend] validate suse and rpm-md format with product informations
[backend] skip suse specific tests on travis
[api][webui] Show remote projects on the package branch page. Fixes #405
[api] improve ruby dialect // spot bug on mysql query
[api] fix the issues Victor's commit highlight

I removed the obviously never working Project.activity completely and
added a FIXME3.0 comment to get rid of that part of the statistics controller
[webui] Fix repository autocomplete and deletion