Added functionality to set the a read only state on the tree nodes.

Added functionality to set the a read only state on the tree nodes.

issue A24Group/Triage#2578
Updated the readme

Updated the readme

issue #2578
Merge pull request #1 from Sh33pman/patch-1

Updated the readme
Merge pull request #152 from nauderuan/treeFix

Added functionality to set the a read only state on the tree nodes.