Bumping libraries and project configuration updates.

[UPDATED]   TestFlight SDK -> 2.0.0
[UPDATED]   USM to deal with exceptions better.
[UPDATED]   Project configuration.

External/TestFlight/TestFlight.h

@@ -6,14 +6,19 @@
 //  Copyright 2011 TestFlight. All rights reserved.
 
 #import <Foundation/Foundation.h>
-#define TESTFLIGHT_SDK_VERSION @"1.2.4"
+#define TESTFLIGHT_SDK_VERSION @"2.0.0"
 #undef TFLog
 
 #if __cplusplus
 extern "C" { 
 #endif
-    void TFLog(NSString *format, ...);
+    /*
+     * Remote Logging
+     * Note: All Logging is synchronous, see the README for more information.
+     */
+    void TFLog(NSString *format, ...) __attribute__((format(__NSString__, 1, 2)));
     void TFLogv(NSString *format, va_list arg_list);
+    void TFLogPreFormatted(NSString *message);
 #if __cplusplus
 }
 #endif
@@ -22,13 +27,12 @@ extern "C" {
  * TestFlight object
  * All methods are class level
  */
-@interface TestFlight : NSObject {
-
-}
+@interface TestFlight : NSObject
 
 /**
  * Add custom environment information
- * If you want to track custom information such as a user name from your application you can add it here
+ * If you want to track custom information such as a user name from your application you can add it here.
+ * NB: This information must be added before the session starts, it is recorded only on session start.
  * 
  * @param information A string containing the environment you are storing
  * @param key The key to store the information with
@@ -43,7 +47,6 @@ extern "C" {
  *                         The token for this application can be retrieved by going to https://testflightapp.com/dashboard/applications/
  *                         selecting this application from the list then selecting SDK.
  */
-
 + (void)takeOff:(NSString *)applicationToken;
 
 /**
@@ -55,17 +58,14 @@ extern "C" {
 + (void)setOptions:(NSDictionary*)options;
 
 /**
- * Track when a user has passed a checkpoint after the flight has taken off. Eg. passed level 1, posted high score
+ * Track when a user has passed a checkpoint after the flight has taken off. Eg. passed level 1, posted high score.
+ * Checkpoints are sent in the background.
+ * Note: The checkpoint is logged synchronously (See TFLog and TFOptionLogOnCheckpoint for more information).
  *
  * @param checkpointName The name of the checkpoint, this should be a static string
  */
 + (void)passCheckpoint:(NSString *)checkpointName;
 
-/**
- * Opens a feedback window that is not attached to a checkpoint
- */
-+ (void)openFeedbackView;
-
 /**
  * Submits custom feedback to the site. Sends the data in feedback to the site. This is to be used as the method to submit
  * feedback from custom feedback forms.
@@ -105,10 +105,13 @@ extern "C" {
  * Pass these as keys to the dictionary you pass to +`[TestFlight setOptions:]`.
  * The values should be NSNumber BOOLs (`[NSNumber numberWithBool:YES]` or `@YES`)
  */
-extern NSString *const TFOptionAttachBacktraceToFeedback; // Defaults to @NO. Setting to @YES attaches the current backtrace, with symbols, to the feedback.
 extern NSString *const TFOptionDisableInAppUpdates; // Defaults to @NO. Setting to @YES, disables the in app update screen shown in BETA apps when there is a new version available on TestFlight.
+extern NSString *const TFOptionFlushSecondsInterval; // Defaults to @60. Set to a number. @0 turns off the flush timer. 30 seconds is the minimum flush interval.
+extern NSString *const TFOptionLogOnCheckpoint; // Defaults to @YES. Because logging is synchronous, if you have a high preformance app, you might want to turn this off.
 extern NSString *const TFOptionLogToConsole; // Defaults to @YES. Prints remote logs to Apple System Log.
 extern NSString *const TFOptionLogToSTDERR; // Defaults to @YES. Sends remote logs to STDERR when debugger is attached.
 extern NSString *const TFOptionReinstallCrashHandlers; // If set to @YES: Reinstalls crash handlers, to be used if a third party library installs crash handlers overtop of the TestFlight Crash Handlers.
+extern NSString *const TFOptionReportCrashes; // Defaults to @YES. If set to @NO, crash handlers are never installed. Must be set **before** calling `takeOff:`.
 extern NSString *const TFOptionSendLogOnlyOnCrash; // Defaults to @NO. Setting to @YES stops remote logs from being sent when sessions end. They would only be sent in the event of a crash.
+extern NSString *const TFOptionSessionKeepAliveTimeout; // Defaults to @30. This is the amount of time a user can leave the app for and still continue the same session when they come back. If they are away from the app for longer, a new session is created when they come back. Must be a number. Change to @0 to turn off.