Workaround for Sequel's inability to cope with the paranoia plugin on join tables of many_to_many relations
Improved the query for working around Sequel's paranoia problem
Cleaned up creation of default switch flows.
Moved anti-spoof flows to interface egress tables.
Updated a link to an Installation Guide in README.md
Deprecated physical/virtual src table.
Removed TABLE_PHYSICAL_SRC table.
Changed TABLE_VIRTUAL_SRC to TABLE_NETWORK_MAC_LEARNING.
Fixed specs for flow table changes.
Pass ingress broadcast and host destined packets through the interface ingress anti-spoof table.
Fixed goto table for host ingress packets.
Merge pull request #173 from axsh/security-groups-relations

Quick workaround for paranoia plugin on join table problem
Merge remote branch 'origin/master' into refactor-flow-tables
Replaced TABLE_{VIRTUAL,PHYSICAL}_{SRC,DST} with the tables TABLE_NETWORK_SRC_MAC_LEARNING and TABLE_NETWORK_DST_MAC_LOOKUP.
Fixed table name in network specs.
Removed unneeded flow helper methods.
Cleaned up creation of drop flows.
Removed controller flow helper.
Removed obsolete flow types.
Added enable_routing and enable_route_translation.