Add secure connection support
Merge pull request #5 from Metaswitch/secure-connections

[Reviewer: Mike] Add secure connection support
Bind memcached interface to local IP address rather than localhost, to allow geo redundancy to work
Mark infinispan as conflicting with memcached and suggesting secure connections
Merge branch 'packaging' into geo_redundancy
Merge pull request #7 from Metaswitch/geo_redundancy

[Reviewer: Mike] Geo redundancy support