Enable logging in SAE; rework log file management to include multiple log directories.

SignalMessaging/utils/DebugLogger.h

@@ -6,8 +6,6 @@
 
 @interface DebugLogger : NSObject
 
-@property (nonatomic) DDFileLogger *fileLogger;
-
 + (instancetype)sharedLogger;
 
 - (void)enableFileLogging;

SignalMessaging/utils/DebugLogger.m

@@ -11,6 +11,14 @@
 #pragma mark Logging - Production logging wants us to write some logs to a file in case we need it for debugging.
 #import <CocoaLumberjack/DDTTYLogger.h>
 
+@interface DebugLogger ()
+
+@property (nonatomic) DDFileLogger *fileLogger;
+
+@end
+
+#pragma mark -
+
 @implementation DebugLogger
 
 + (instancetype)sharedLogger