Resolves issue #230
This MR removes the HYTEG_BUILD_DOC flag again. CMake will check for Doxygen and not add a doc target, if it is not found. Additionally the commit adds several new feature macros to the list we predefine for Doxygen.
This MR removes the HYTEG_BUILD_DOC flag again. CMake will check for Doxygen and not add a doc target, if it is not found. Additionally the commit adds several new feature macros to the list we predefine for Doxygen.