Build quat2eul for Linux-Distributions:

- Similar to Matlab but runs from the command line.
- The math implementation is adopted from the Matlab-Function SpinCalc from J. Fuller. You can check the implementation against WolframAlpha or the technical report of J Diebel.
- more Info: quat2eul.cpp
Build quat2eul.exe for Windows:
Licensed under http://opensource.org/licenses/BSD-3-Clause
