Add missing release notes for 1.6 beta 2.
Add missing release notes for 1.6 beta 2.

sgallagher/reviewboard,Khan/reviewboard,davidt/reviewboard,atagar/ReviewBoard,brennie/reviewboard,bkochendorfer/reviewboard,1tush/reviewboard,1tush/reviewboard,Khan/reviewboard,chazy/reviewboard,chipx86/reviewboard,davidt/reviewboard,chazy/reviewboard,bkochendorfer/reviewboard,Khan/reviewboard,1tush/reviewboard,brennie/reviewboard,atagar/ReviewBoard,1tush/reviewboard,KnowNo/reviewboard,chipx86/reviewboard,1tush/reviewboard,custode/reviewboard,chazy/reviewboard,1tush/reviewboard,reviewboard/reviewboard,beol/reviewboard,bkochendorfer/reviewboard,chazy/reviewboard,1tush/reviewboard,atagar/ReviewBoard,reviewboard/reviewboard,atagar/ReviewBoard,custode/reviewboard,chipx86/reviewboard,atagar/ReviewBoard,atagar/ReviewBoard,chazy/reviewboard,KnowNo/reviewboard,bkochendorfer/reviewboard,beol/reviewboard,KnowNo/reviewboard,brennie/reviewboard,sgallagher/reviewboard,Khan/reviewboard,sgallagher/reviewboard,Khan/reviewboard,1tush/reviewboard,atagar/ReviewBoard,brennie/reviewboard,beol/reviewboard,atagar/ReviewBoard,chazy/reviewboard,1tush/reviewboard,reviewboard/reviewboard,Khan/reviewboard,davidt/reviewboard,custode/reviewboard,Khan/reviewboard,reviewboard/reviewboard,atagar/ReviewBoard,chazy/reviewboard,sgallagher/reviewboard,KnowNo/reviewboard,beol/reviewboard,chazy/reviewboard,custode/reviewboard,chipx86/reviewboard,davidt/reviewboard,Khan/reviewboard,chazy/reviewboard,Khan/reviewboard