Add Angular.js and Postgres books.

free-programming-books.md

@@ -982,6 +982,7 @@
 
 ####Angular.js
 * [AngularJS in 60 Minutes](http://fastandfluid.com/publicdownloads/AngularJSIn60MinutesIsh_DanWahlin_May2013.pdf) (PDF)
+* [AngularJS Succinctly](http://www.syncfusion.com/resources/techportal/ebooks/angularjs) (PDF, Kindle) *(Just fill the fields with any values)*
 * [Recipes with Angular.js](https://leanpub.com/recipes-with-angular-js/read) *(Leanpub, by Frederik Dietz)*
 
 
@@ -1276,6 +1277,7 @@ See also [TeX](#tex)
 
 ###PostgreSQL
 * [Practical PostgreSQL](http://www.commandprompt.com/ppbook/)
+* [Postgres Succinctly](http://www.syncfusion.com/resources/techportal/ebooks/postgres) (PDF, Kindle) *(Just fill the fields with any values)*
 
 
 ###PowerShell