Move globals from main.cpp to more sane locations

Move debug streams to log.cpp|h

Move GUI-related globals to clientlauncher

Move g_settings and g_settings_path to settings.cpp|h

Move g_menuclouds to clouds.cpp|h

Move g_profiler to profiler.cpp|h

src/mapgen.cpp

@@ -31,8 +31,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "content_mapnode.h" // For content_mapnode_get_new_name
 #include "voxelalgorithms.h"
 #include "profiler.h"
-#include "settings.h" // For g_settings
-#include "main.h" // For g_profiler
+#include "settings.h"
 #include "treegen.h"
 #include "serialization.h"
 #include "util/serialize.h"