CSR 11 5 documentation is now live!
Documents are all here:
http://www.cisco.com/c/en/us/support/unified-communications/collaboration-systems-release-11-5/model.html
Updated Compatibility matrix
http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/uc_system/unified/communications/system/Compatibility/CSR-Compatibility-Matrix-InteractiveHTML.html