add Google C++ and Python courses

free-courses-en.md

 ###Index
+* [C++](#c)
 * [Databases](#databases)
 * [Haskell](#haskell)
 * [HTML / CSS](#html--css)
 * [JS](#js)
 * [iOS](#ios)
 * [Oracle PL/SQL](#oracle-plsql)
+* [Python](#python)
 * [Ruby](#ruby)
 
+###C++
+* [Google's C++ Course](https://developers.google.com/edu/c++/)
+
+
 ###Databases
 * [Database Systems](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-830-database-systems-fall-2010/) (MIT's opencourseware)
 * [Introduction to Databases](https://class.stanford.edu/courses/Engineering/db/2014_1/about) (Stanford University)
@@ -30,6 +36,11 @@
 ###Oracle PL/SQL
 * [Steven Feuerstein's PL/SQL Obsession - Videos and Presentations](http://www.toadworld.com/platforms/oracle/w/wiki/8243.plsql-obsession.aspx)
 
+
+###Python
+* [Google's Python Course](https://developers.google.com/edu/python/)
+
+
 ###Ruby
 * [RubyMonk - Interactive Ruby tutorials](http://rubymonk.com)