Changes factory name from Base to BaseModel.

Hi Ben, how do you going?

Thanks a lot for this great work and the blog posts. I'm using this in my project and it help me soo much.   

What do you think about change the factory name from "Base" to "BaseModel"? This way, it's following the default Angular's nomenclature (i.e. FooController, FooService).

Anyway, thanks and congratulations for this awesome job!

Best regards,

Ronaldo