Set dnsmasq_dns_server option in dhcp_agent.ini

This option is needed to allow dnsmasq process (which is started for
every quantum subnet) to forward dns queries.
Replace github.com/dellcloudedge mentions with github.com/crowbar
Merge pull request #65 from tpaszkowski/pull-req-fix-dnsmasq-resolver

Set dnsmasq_dns_server option in dhcp_agent.ini
Merge pull request #68 from vuntz/replace-dellcloudedge

Replace github.com/dellcloudedge mentions with github.com/crowbar
Merge pull request #19 from crowbar/release/pebbles/master

pull last changes