Old reference provided in the documentation & installation steps
But it does not work and the working sample referring to different jquery.treeTable.js file on the server. Its correct in the GitHub scource code
Other answers referred to code treetable() has to be like treeTable(). But it didn't work. :-(
Solution: To get the jquery.treeTable.js file from GitHub
Added a 301 redirect from old docs to new docs.