Only install the memory hook if -v is given.

This way, we can still set the debug level in the configuration, and not
see the log just absolutely flooded with memory allocations and whatnot.
This is helpful because I want debug messages to show up in development,
but not in production, but having all the memory logging makes it
almost impossible to pick anything else out of the log. I want the
feature available, just not on by default because it's useful in limited
circumstances.

contrib/development.conf

@@ -7,7 +7,7 @@
 	"threads": 2,
 	"log": {
 		"output": "stdout",
-		"//level": "debug",
+		"level": "debug",
 		"timestampFormat": "none",
 		"color": true
 	}

src/Main.c

@@ -111,8 +111,6 @@ main(int argc, char **argv)
         return EXIT_FAILURE;
     }
 
-    MemoryHook(TelodendriaMemoryHook, NULL);
-
     TelodendriaPrintHeader();
 
     while ((opt = getopt(argc, argv, "f:Vvn")) != -1)
@@ -142,6 +140,7 @@ main(int argc, char **argv)
     if (flags & ARG_VERBOSE)
     {
         LogConfigLevelSet(LogConfigGlobal(), LOG_DEBUG);
+        MemoryHook(TelodendriaMemoryHook, NULL);
     }
 
     if (flags & ARG_VERSION)