docs: update of docs

* Updated QEMU configure command line paramaters
* Updated known issues
* Updated release date

Change-Id: I453e453868d49855f4f5d2c20dc617fb26e7973f
Signed-off-by: Kevin Traynor <kevin.traynor@intel.com>
Reviewed-by: Stephen Finucane <stephen.finucane@intel.com>
Reviewed-by: Mark D. Gray <mark.d.gray@intel.com>