a few changes to RedBlackTree -- now being used for BioTree

.gitignore

Hello.txt

Hello:

src/Main.java

src/data/biotree/BioTree.java

src/model/TrawlExpert.java

src/search/Field.java

src/search/RBNode.java

src/search/RedBlackTree.java

src/search/RedBlackTreeTest.java