Make MACs optional on static interfaces unless DHCP enabled
Add custom clean for dynamic interfaces
Migrate all interfaces in public and private views
add system key-values to migration
Fix faulty workgroup migrations
Remove department and location fields from system model
Ignore object not found errors while migrating
Merge pull request #161 from murrown/mac_addr_optional

Mac addresses are optional if DHCP is not enabled
key values appear instead of breaking system detail view
Merge pull request #171 from murrown/system_keyvalue_migrate

System keyvalue migrate
Merge pull request #172 from murrown/dhcp_migrate_ignore_not_found

Ignore object not found errors while migrating