fix some small issues:

remove empty unit test

remove compiler directives

move trip related files from routing_algorithms to algorithms

run clang-format on files

fix all std::size_t related issues

improve code by adding std::move()s

clean up includes

fixing several code stye and improvement issues

add several small code improvements

return single scc in SplitUnaccessibleLocations() when theres only one

change ComputeRoute() to return an InternalRouteResult by value

improve some code style issues

library/osrm_impl.hpp

@@ -28,10 +28,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef OSRM_IMPL_HPP
 #define OSRM_IMPL_HPP
 
-// #if __cplusplus > 199711L
-// #define register      // Deprecated in C++11.
-// #endif  // #if __cplusplus > 199711L
-
 class BasePlugin;
 struct RouteParameters;