update release notes; paralellize cataloging plugin

RELEASE_NOTES.txt

+Release 1.12 (08/XX/2018)
+=============================
+- Added generic script processing plugin for DAQ service
+- Parallelized cataloging plugin; this significantly increased performance 
+  for uploads using directory mode
+
 Release 1.11 (05/15/2018)
 =============================
 - Added support for compressing and decompressing files