This is true:
-1 > 1u
because the integer literal `-1` is first converted to a large unsigned
value and then compared to the unsigned `1`.
This patch fixes several of those isses in the farthest insertion
algorithm.
`-Wsign-compare` catches those issues.
References:
- http://stackoverflow.com/a/5416498
- C++14 standard
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
