Make small improvements in the JavaScript program: add library

There is a simple JavaScript program that uses jquery and fabric.

In this task, you need to connect the GoJS library and try to make there a number of simple functions.
The project is divided into the blocks make the current TK, if all OK, do next block.

At the first stage there is a detailed TOR.
Details can be discussed with voice/chat.

Payment promptly.
It is possible to work using a safe transaction or you can break the task into many subtasks and each subtask pay as you perform.