Enum Drawer

[Novack]

Great work!
You're missing the Enum drawer, I added it myself, by checking the base type.
Changed in the method GetParameterDrawer:

if (typeDrawer.TryGetValue (parameterType, out drawer))
{
return drawer;
}
else if (typeDrawer.TryGetValue(parameterType.BaseType, out drawer)) // HERE
{
return drawer;
}

Then you add the corresponding content to the typeDisplayName and typeDrawer dictionaries.

Thanks for the work!