Move headers from server/include to include/maxscale

- Headers now to be included as <maxscale/xyz.h>
- First step, no cleanup of headers has been made. Only moving
  from one place to another + necessary modifications.

query_classifier/qc_sqlite/qc_sqlite.c

@@ -15,13 +15,13 @@
 
 #include <signal.h>
 #include <string.h>
-#include <log_manager.h>
-#include <modinfo.h>
+#include <maxscale/log_manager.h>
+#include <maxscale/modinfo.h>
 #include <mysql_client_server_protocol.h>
-#include <platform.h>
-#include <query_classifier.h>
-#include <skygw_utils.h>
-#include <modutil.h>
+#include <maxscale/platform.h>
+#include <maxscale/query_classifier.h>
+#include <maxscale/skygw_utils.h>
+#include <maxscale/modutil.h>
 #include <maxscale/alloc.h>
 #include "builtin_functions.h"