fixed bug where release version was not working under .net 4.
http://stackoverflow.com/questions/2279896/log4net-and-net-4-0-rc
https://issues.apache.org/jira/secure/attachment/12568787/log4net-347.patch
updated the animation/status to get updated on sync start/end instead of each separate action
Fixed sync pause/resume issues: ensure SyncInBackground() does not run when Suspended, fixed so animation stops when sync is paused mid sync
bug fix: deleting a file on the server, then modify the same file on the client, then trigger a manual sync would cause the local changes to be lost.  updated so the file will be uploaded to the server (or backed up in case of unidirectional sync)