How to Migrate from Contracts -> RequestForms

• Contract -> ResponseForm
• For fields other than ContractWholeNumberField and ContractDoubleField, just remove "Contract" from the beginning.
• For ContractWholeNumberField and ContractDoubleField, switch to NumberField.
• Pretty much all field definitions can be done in a chain. All set-/add- methods return the field again.
• The field's type must now be passed in as the last parameter to the constructor
  • eg: new Field<>(form, "name", Integer.class)
• All the basic value accessors are automatically applied.
  • Specifically, this means any method reference-able stuff. Boolean defaults to getBooleanLenient.
• setDefaultValue -> setDefaultOnProcess
  • The name is worse, but also less misleading. I'll probably just go with setDefault at some point. Maybe.
• setMultivalued -> (now only in SelectField) setAllowMultipleValues