Rename Vool to Sol

Simple is really the descriptive name for the layer
Sure, it is "virtual" but that is not as important as the fact that it is simple (or simplified)
Also objct (based really) is better, since orientated implies it is a little like that, but only orientated, not really it. Sol only has objects, nothing else
Just cause i was renaming anyway

lib/ruby/ruby_block_statement.rb

@@ -13,16 +13,16 @@ module Ruby
       raise "no bod" unless @body
     end
 
-    # This resolves to a Vool SendStatement, in fact that is mostly what it is.
+    # This resolves to a Sol SendStatement, in fact that is mostly what it is.
     #
     # The implicitly passed block (in ruby) gets converted to the constant it is, and
     # is passed as the last argument.
     #
-    def to_vool
+    def to_sol
       #block_name = "implicit_block_#{object_id}".to_sym
-      lambda = Vool::LambdaExpression.new( @args.dup , @body.to_vool)
-      ret = @send.to_vool
-      sendd = ret.is_a?(Vool::Statements) ? ret.last : ret
+      lambda = Sol::LambdaExpression.new( @args.dup , @body.to_sol)
+      ret = @send.to_sol
+      sendd = ret.is_a?(Sol::Statements) ? ret.last : ret
       sendd.arguments << lambda
       ret
     end