Changed the names of the widgets.

Some of the widgets had names that didn't follow the convention I had
for the lineEdit widgets. All the widgets now have a standard convention
of first half of widget name and what the widget records separated by a
underscore. For example, the LineEdit for first name becomes line_f_name.
Added add_item method.

The add_item method will take 3 arguments, a table name string, a column
list, and a value list. It will then construct a insert statement for SQLite.
Started implementing functionality for the AddBrotherWindow.

Still have to grab information for checkboxes, comboboxes, and a
textbox. Also need to finish the db.DB.add_item method to write out to
SQLite.