rename ClassCompiler to MomComplier

ended up not even using the class, it just came from there
It actually compiles methods, and it turns out is the point where builtin comes into the picture as it's boot process also returns method compilers

lib/vool/class_statement.rb

@@ -29,7 +29,7 @@ module Vool
         raise "Only methods for now #{node}" unless node.is_a?(MethodStatement)
         method_compilers << node.to_mom(@clazz)
       end
-      Mom::ClassCompiler.new(@clazz , method_compilers)
+      Mom::MomCompiler.new(method_compilers)
     end
 
     def each(&block)