MESH.rb in mesh-medical-subject-headings-2.2.0

- old
+ new

@@ -4,5 +4,8 @@
 require 'MESH/tree'
 require 'MESH/heading'
 require 'MESH/translator'
 require 'MESH/classifier'
 require 'MESH/semantic_types'
+require 'MESH/lexical_types'
+require 'MESH/semantic_relationship_types'
+require 'MESH/entry'