Place Protected Members and Abstract Wrappers class in pMixins.AutoGenerated NS

[ppittle]

Default to placing Protected Members and Abstract Wrappers classes in the pMixins.AutoGenerated namespace and only fallback to housing inside the __pMixinAutoGenerated private class if necessary.

Reasoning:

    public class Mixin
    {
        protected Mixin(object obj){}
    }

    public abstract class AbstractMixin
    {
        protected AbstractMixin(object obj){}
    }

    [pMixin(Mixin = typeof(Mixin), ExplicitlyInitializeMixin = true)]
    [pMixin(Mixin = typeof(AbstractMixin), ExplicitlyInitializeMixin = true)]
    public partial class NonPublicNonParameterlessConstructor
    {
        Mixin IMixinConstructorRequirement<Mixin>.InitializeMixin()
        {
           // should be able to say return new AbstractMixinAbstractWrapper(this, 1);
            return new __pMixinAutoGenerated.pMixins_Mvc_Recipes_NonPublicNonParameterlessConstructor_Mixin.MixinAbstractWrapper((this, 1);
        }

        AbstractMixinAbstractWrapper IMixinConstructorRequirement<AbstractMixinAbstractWrapper>.InitializeMixin()
        {
           //Wrapper is in 
            return new AbstractMixinAbstractWrapper(this, 1);
        }
    }

[ppittle]

Added in 0.5.1