Add translations, expose servants and servant in controller, create index and show view
Add new action and form, add strong params strategy
add simple form bootstrap support
custom checkbox wrapper !, Use panel instead of table for forms
install datepicker
add simple_form custom inputs, change _fields
Kick out simple_form, apply formatic
add picker to year and date, add update action end edit view,
 set btn names
add destroy action
remove formatic-bootstrap and use simple formatic, add and format select input,  add rank table and model, add dependencies to rank and servant model