Finish preliminary offline support

* ProgressProvider now has an abort() call
* Abort button support added to the progress dialog
* YggdrasilTask and MojangAccount adapted to support abort

YggdrasilTask will time out after 10 seconds of no network activity, or when the user pushes the Play Offline button.
In offline mode, all instance update tasks are skipped! This will need further work.

1 files changed, 1 insertions, 0 deletions

diff --git a/logic/OneSixUpdate.h b/logic/OneSixUpdate.h
index b86c205f..5fd2c59f 100644
--- a/logic/OneSixUpdate.h
+++ b/logic/OneSixUpdate.h
@@ -48,6 +48,7 @@ slots:
 
 	// extract the appropriate libraries
 	void prepareForLaunch();
+
 private:
 	NetJobPtr specificVersionDownloadJob;
 	NetJobPtr jarlibDownloadJob;