Emit library versions when running pioneer -version

This is super useful for checking the build system because you can run
the binary quickly and get some output to check that it doesn't totally
fail at load time, without actually waiting for the full game to load.

src/main.cpp

@@ -8,6 +8,7 @@
 #include "galaxy/GalaxyGenerator.h"
 #include "galaxy/Galaxy.h"
 #include "utils.h"
+#include "versioningInfo.h"
 #include <cstdio>
 #include <cstdlib>
 
@@ -206,6 +207,7 @@ start:
 			std::string version(PIONEER_VERSION);
 			if (strlen(PIONEER_EXTRAVERSION)) version += " (" PIONEER_EXTRAVERSION ")";
 			Output("pioneer %s\n", version.c_str());
+			OutputVersioningInfo();
 			break;
 		}