### 0.2

Remove the buggy attr_accessor method for accessing with_model classes. Now
there is only the constant available in the example group.

### 0.1.5

WithModel::Base is now marked as an abstract_class, which makes polymorphic
belongs_to work properly.

### 0.1.4

Add ability to pass arguments to create_table.

### 0.1.2

Make Mixico optional.