Add "The Boost C++ Libraries", Boris Schäling
Add german book "Die Boost C++ Bibliotheken", Boris Schäling
Add german book "Programmieren in C++: Einführung", B. Schäling
Add german book "Programmieren in C++: Aufbau", B. Schäling
Add two german books on Java by Boris Schäling
Merge pull request #353 from ericguirbal/en

Add "The Boost C++ Libraries", Boris Schäling
Add german book "Programmieren in C#: Enführung", Schälling
Add german book "Webseiten erstellen mit Javascript", Schälling
Add german book "Der moderne Softwareentwicklungsprozess mit UML", Schäling
Merge pull request #354 from ericguirbal/de

Add some german books by Boris Schäling
[JA] Add Clojure section with 3 books
[JA] Add an Android Secure Coding book