Implement property overloading

[inda5th]

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This will allow outside classes to be able to read properties of the MY_Model class when necessary.

[jamierumbelow]

Could you show an example of where this might be useful?

[inda5th]

@jamierumbelow I just thought it would be useful for when you have have other models that aren't based on MY_Model, and don't wish to make them children of MY_Model for whatever reason. So you could do $this->my_model_child->primary_key.

In my case, I have an application that I began before I discovered MY_Model, and don't wish to convert all the older models.

[jamierumbelow]

Rather than using __get() - your implementation is wrong anyway, since you're just returning the property name as a string value - wouldn't it be better to just convert over the protected and private properties to public?

[inda5th]

Ooops, I didn't even realize I implemented it improperly.