Added file structure for ./doc
Add Doxyfile
Add initial ./src file structure
Add include guards
Merge pull request #1 from matthiasbeyer/add-doc_file_structure

Added file structure for ./doc
Add inclusion of header file to sources
Merge pull request #3 from matthiasbeyer/add-doxyfile

Add Doxyfile
Merge pull request #4 from matthiasbeyer/add-src_file_structure

Add initial ./src file structure
Add initial CMakeLists.txt for the project
Add CMakeLists.txt for the source subdirectory