Bump version to 0.7.0 RC4
Merge pull request #45 from Woorank/marathon-v0.7.0-RC4

Bump version to 0.7.0 RC4
Switch hadiscovery to marathon haproxy bridge solution on mess slaves
Switch hadiscovery to marathon haproxy bridge solution on mess slaves
Pull
Merge pull request #46 from Woorank/haproxy-on-slaves

Haproxy on slaves