enabled compress middleware
removed relation objects
removed manual compress middleware; need to use --prod
implemented customer without preferences
moved xtupleobject, initialized employee and department
new models

new file:   api/models/Group.js
new file:   api/models/Place.js
new file:   api/models/Site.js
new file:   api/models/SiteType.js
new file:   api/models/base/HasCode.js