Ability to add attributes to entity using simplified attribute definition

[jreznot]

I'm always frustrated when I created entity using CLI and cannot add attributes right now from a terminal.

It would be great if CLI after creating entity ask me if I want to add attributes. After that I will be able to enter attribute types (using very-short definition) and attribute name. Like:

> Do you want to add attributes to Customer entity (y/n):
y
> Enter attribute definitions using type + attribute name:
D date, S title, L number, B active, T time, sec$User user, RoleType roleType (Enter)

> Added attributes:

  Date date;
  String title;
  Long number;
  Boolean active;
  java.sql.Time time;
  User user;
  RoleType roleType;

Studio must add new attributes to Java class, generate get/set methods, add attributes to create-db.sql script