Add query builder.
Remove attr accessors.
Move query to active force folder.
Update select statment in active force.
Add .to_a
Update  query to be a class method.
Add to_a method.
Inclue Query class on ActiveForce
Inclue Query class on ActiveForce
Inclue Query class on ActiveForce
bump version.
Return query object in query method.
Should ignore duplicated entries in select.
Fix typo.
Add order and offset option.
Add join method.
Add has_many relationship.
Update when send query to sql client.
instance method.