Add Foundation of Data Structures to free-courses list (#2669)

* Add Foundation of Data Structures to free-courses list

* Add Foundation of Data Structures to free-courses list

* Add Foundation of Data Structures to free-courses list with correct number of blank lines

free-courses-en.md

-### Index
+### Index
 
 * [Algorithms & Data Structures](#algorithms--data-structures)
 * [Android](#android)
@@ -48,9 +48,10 @@
 ### Algorithms & Data Structures
 
 * [Berkeley University CS 61B: Data Structures](http://datastructur.es/sp16/)
+* [IIT Bombay Foundation of Data Structures (CS213.1x)](https://courses.edx.org/courses/course-v1:IITBombayX+CS213.1x+1T2017/course/)
 * [Introduction to Algorithms (SMA 5503)](https://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-046j-introduction-to-algorithms-sma-5503-fall-2005) - Charles Leiserson
 * [Stanford University Algorithms: Design and Analysis, Part 1](http://online.stanford.edu/course/algorithms-design-and-analysis-part-1)
-* [Stanford University Algorithms:Algorithms: Design and Analysis, Part 2](http://online.stanford.edu/course/algorithms-design-and-analysis-part-2)
+* [Stanford University Algorithms: Design and Analysis, Part 2](http://online.stanford.edu/course/algorithms-design-and-analysis-part-2)
 
 
 ### Assembly