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

test/ruby/test_if_statement2.rb

@@ -1,51 +1,51 @@
 require_relative 'helper'
 
 module Ruby
-  class TestIfStatementVool < MiniTest::Test
+  class TestIfStatementSol < MiniTest::Test
     include RubyTests
 
     def setup
-        @lst = compile("if(true) ; a = 1 ; else ; a = 2 ; end").to_vool
+        @lst = compile("if(true) ; a = 1 ; else ; a = 2 ; end").to_sol
     end
     def test_class
-      assert_equal Vool::IfStatement , @lst.class
+      assert_equal Sol::IfStatement , @lst.class
     end
     def test_true
-      assert_equal Vool::LocalAssignment , @lst.if_true.class
+      assert_equal Sol::LocalAssignment , @lst.if_true.class
       assert @lst.has_true?
     end
     def test_false
-      assert_equal Vool::LocalAssignment , @lst.if_false.class
+      assert_equal Sol::LocalAssignment , @lst.if_false.class
       assert @lst.has_false?
     end
     def test_condition
-      assert_equal Vool::TrueConstant , @lst.condition.class
+      assert_equal Sol::TrueConstant , @lst.condition.class
     end
     def test_to_s
       assert_tos "if (true);a = 1;else;a = 2;end" , @lst
     end
   end
-  class TestIfStatementVoolHoisted < MiniTest::Test
+  class TestIfStatementSolHoisted < MiniTest::Test
     include RubyTests
 
     def setup
-        @lst = compile("if(foo() == 1) ; a = 1 ; end").to_vool
+        @lst = compile("if(foo() == 1) ; a = 1 ; end").to_sol
     end
 
     def test_class
-      assert_equal Vool::Statements , @lst.class
+      assert_equal Sol::Statements , @lst.class
     end
     def test_first_class
-      assert_equal Vool::LocalAssignment , @lst.first.class
+      assert_equal Sol::LocalAssignment , @lst.first.class
     end
     def test_last_class
-      assert_equal Vool::IfStatement , @lst.last.class
+      assert_equal Sol::IfStatement , @lst.last.class
     end
     def test_true
-      assert_equal Vool::LocalAssignment , @lst.last.if_true.class
+      assert_equal Sol::LocalAssignment , @lst.last.if_true.class
     end
     def test_condition
-      assert_equal Vool::SendStatement , @lst.last.condition.class
+      assert_equal Sol::SendStatement , @lst.last.condition.class
       assert_equal :== , @lst.last.condition.name
     end
   end