#590 Add explanation for Composite pattern

composite/etc/composite.urm.puml

@@ -1,43 +0,0 @@
-@startuml
-package com.iluwatar.composite {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-  }
-  class Letter {
-    - c : char
-    + Letter(c : char)
-    # printThisAfter()
-    # printThisBefore()
-  }
-  abstract class LetterComposite {
-    - children : List<LetterComposite>
-    + LetterComposite()
-    + add(letter : LetterComposite)
-    + count() : int
-    + print()
-    # printThisAfter() {abstract}
-    # printThisBefore() {abstract}
-  }
-  class Messenger {
-    + Messenger()
-    ~ messageFromElves() : LetterComposite
-    ~ messageFromOrcs() : LetterComposite
-  }
-  class Sentence {
-    + Sentence(words : List<Word>)
-    # printThisAfter()
-    # printThisBefore()
-  }
-  class Word {
-    + Word(letters : List<Letter>)
-    # printThisAfter()
-    # printThisBefore()
-  }
-}
-LetterComposite -->  "-children" LetterComposite
-Letter --|> LetterComposite 
-Sentence --|> LetterComposite 
-Word --|> LetterComposite 
-@enduml