What is this?

It's the same as [https://github.com/angular/material2]@angular/material2 but over here we got Multi Column Sorting for mat-table.

It's the same as [https://github.com/relair/material2]@relair/material2 but over here we are synched to latest []@angular/material2.

See some discussion about MatMultiSort feature in the Github issue.

How I use this?

1. Let's say you have your project in your local folder /code/myproject
2. Open terminal to /code
3. git clone https://github.com/hughanderson4/material2.git
4. cd material2
5. yarn
6. gulp material:build-release
7. cd ../myproject
8. rm -r -f node_modules/@angular/material
9. yarn add @angular/material2@../material2/dist/releases/material
10. Now edit angular.json in myproject and set preserveSymLinks=true, since you are referencing local material. See StackOverflow post.
11. Now you can use the features of MatMultiSort, it is documented here.