Document issues OC-11669 and OC-11670, note the bump to EC 11.1.8. Better explain how to monitor the system during an upgrade and what services are OK to be down.  Remove now unneeded patches for OC-11490 and OC-11382
Include the OC-11575 and OC-11601 patches in the page
Merge pull request #285 from opscode/irving/11.1.8-fixes

Upgrade notes update for 11.1.8  (Please hold until EC11.1.8 ships)