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/proxy_factory.cc b/proxy_factory.cc
index a4f2adc..3657401 100644
--- a/proxy_factory.cc
+++ b/proxy_factory.cc
@@ -4,12 +4,11 @@
 
 #include "shill/proxy_factory.h"
 
-#include <base/logging.h>
-
 #include "shill/dbus_objectmanager_proxy.h"
 #include "shill/dbus_properties_proxy.h"
 #include "shill/dbus_service_proxy.h"
 #include "shill/dhcpcd_proxy.h"
+#include "shill/logging.h"
 #include "shill/mm1_modem_modem3gpp_proxy.h"
 #include "shill/mm1_modem_modemcdma_proxy.h"
 #include "shill/mm1_modem_proxy.h"