Move the routines which render log messages out of logger.cc; this breaks the

dependency which required logger.cc to have access to the entire rest of the
system. Although we still need to forward declare all the log messages.

build.py

@@ -83,6 +83,7 @@ cxxlibrary(
         "./lib/layout.cc",
         "./lib/ldbs.cc",
         "./lib/logger.cc",
+        "./lib/logrenderer.cc",
         "./lib/proto.cc",
         "./lib/readerwriter.cc",
         "./lib/sector.cc",