Rename Block to RubyBlock at Ruby level

The parser presents the whole call that defines the block as a block. And so does the Ruby layer, as we don't want to do processing in ast.
Just making it clearer, also Vool:: block will have to be renamed

lib/ruby/ruby_block_statement.rb

@@ -5,7 +5,7 @@ module Ruby
   # A block is in essence quite like a method, so the block definition is like a
   # method definition, except it is not bound to the class direcly, but the enclosing
   # method. The enclosing method also provides the scope.
-  class BlockStatement < Statement
+  class RubyBlockStatement < Statement
     attr_reader :send ,  :args , :body
 
     def initialize( send , args , body )

lib/ruby/ruby_compiler.rb

@@ -76,10 +76,11 @@ module Ruby
     end
 
     def on_block(block_node)
+      puts block_node.to_s
       sendd = process(block_node.children[0])
       args = process(block_node.children[1])
       body = process(block_node.children[2])
-      BlockStatement.new(sendd , args , body)
+      RubyBlockStatement.new(sendd , args , body)
     end
 
     def on_yield(node)