Slightly inconsistent naming with Spec class - all other classes go with a lower register

[evshvarov]

This is about class names generation. All lower register except Spec: disp, impl, but Spec...:

[lscalese]

Hi @evshvarov !

Yes , indeed.
I remember why this difference.

I prefer to use lower case for package and the first letter in upper case for the class name, but to follow the rules of the built-in existing tools ^%REST I let these 2 classes in lower case.

It should be easily modified, but I have to check every reference in the code generator.