shill: Rename SMLOG to SLOG

Rewrite SMLOG as SLOG, thus saving many edits.  Change the location of
the SLOG macro to be memory_log.h, requiring includes to be rewritten
and reordered.  While we're rewriting includes, moving all assorted
logging includes into a generic shill/logging.h, thus saving future
logging changes from altering these includes ever again.

BUG=chromium-os:31145
TEST=Builds, unit tests still pass

Change-Id: Ie5129fcbdda87f3149460209a682c698b876b09a
Reviewed-on: https://gerrit.chromium.org/gerrit/29650
Commit-Ready: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Tested-by: Christopher Wiley <wiley@chromium.org>
diff --git a/connection.cc b/connection.cc
index 8bf3153..55ec2b4 100644
--- a/connection.cc
+++ b/connection.cc
@@ -8,10 +8,10 @@
 #include <linux/rtnetlink.h>
 
 #include "shill/device_info.h"
+#include "shill/logging.h"
 #include "shill/resolver.h"
 #include "shill/routing_table.h"
 #include "shill/rtnl_handler.h"
-#include "shill/scope_logger.h"
 
 using base::Bind;
 using base::Closure;