Added Angular section under TypeScript (#5124)

- With 2 new books
- Shifted one existing book in Angular.js to Angular
- Removed a book: https://leanpub.com/practical-angular from Angular.js because it's a Paid book
- Deno is now included under TypeScript, like in the Index

free-programming-books.md

@@ -228,6 +228,7 @@
 * [Tizen](#tizen)
 * [TLA](#tla)
 * [TypeScript](#typescript)
+  * [Angular](#angular)
   * [Deno](#deno)
 * [Unix](#unix)
 * [Verilog](#verilog)
@@ -1757,8 +1758,6 @@ Kerridge (PDF) (email address *requested*, not required)
 * [AngularJS Notes for Professionals](https://goalkicker.com/AngularJSBook) - Compiled from StackOverflow Documentation (PDF)
 * [AngularJS Succinctly](https://www.syncfusion.com/resources/techportal/ebooks/angularjs) (PDF, Kindle) (email address *requested*, not required)
 * [AngularJs vs EmberJs](http://angularjs-emberjs-compare.bguiz.com)
-* [Build a Full-Stack Web Application Using Angular & Firebase](https://www.c-sharpcorner.com/ebooks/build-a-full-stack-web-application-using-angular-and-firebase) - Ankit Sharma
-* [Practical Angular: Build your first web apps with Angular 8](https://leanpub.com/practical-angular) - Ahmed Bouchefra *(Leanpub account or valid email requested)*
 * [Seven-Part Introduction to Angular](http://ngokevin.com/blog/angular-1/)
 * [Unit Testing Best Practices in AngularJS](http://andyshora.com/unit-testing-best-practices-angularjs.html)
 
@@ -2858,7 +2857,14 @@ Kerridge (PDF) (email address *requested*, not required)
 * [TypeScript Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/typescript) (PDF, Kindle) (email address *requested*, not required)
 
 
-### Deno
+#### Angular
+
+* [Angular 2+ Notes for Professionals](https://goalkicker.com/Angular2Book/) - Compiled from StackOverflow documentation (PDF)
+* [Angular Docs](https://angular.io/docs) 
+* [Build a Full-Stack Web Application Using Angular & Firebase](https://www.c-sharpcorner.com/ebooks/build-a-full-stack-web-application-using-angular-and-firebase) - Ankit Sharma
+
+
+#### Deno
 
 * [Deno Manual](https://deno.land/manual)
 * [FlavioCopes Deno Handbook](https://flaviocopes.com/deno) - *free PDF with registration*