Initializes import_db.sql and questions_database.rb
Finishes initialization of database
Creates separate files for each class and table.

Also initializes gitignore.
Adds more class methods for user and questions
Adds reply class methods
Adds methods for Question Like class
Adds average karma function and saves for users.
Moves around create methods in each class, makes private.
Implements a unified save function.

Adds tags table and a Database parent class for some of the database
object classes.
Adds create method in Database class. All additional DB classes now inheret from DB.
Cleans up creat and save methods in Database class.