release notes updated

RELEASE_NOTES.txt

 Release 0.8 (01/26/2016)
 =============================
+
 - Enhanced upload/daq performance and functionality (hidden files are not
-  processed, for uploads system can detect files that had been processed 
-  already)
+  processed; for uploads system can detect files that had been processed 
+  already; added handling and reporting for processing errors)
 - Source file checksum is calculated for rsync/gridftp plugins by default
 
 Release 0.7 (12/08/2015)