move vool statements into own directory

also tests for guard to work

lib/vool/ruby_compiler.rb

@@ -1,3 +1,18 @@
+require_relative "statements/array_statement"
+require_relative "statements/assignment_statement"
+require_relative "statements/basic_values"
+require_relative "statements/class_statement"
+require_relative "statements/hash_statement"
+require_relative "statements/if_statement"
+require_relative "statements/logical_statement"
+require_relative "statements/method_statement"
+
+require_relative "statements/return_statement"
+require_relative "statements/statements"
+require_relative "statements/send_statement"
+require_relative "statements/variables"
+require_relative "statements/while_statement"
+
 module Vool
   # This RubyCompiler compiles incoming ruby (string) into vools internal representation
   # with the help of the parser gem. The parser outputs an abstract ast (nodes)