Added documentation for installdrive and ksdevice kernel options
Added documentation for installdrive and ksdevice kernel options

 * installdrive from https://review.openstack.org/#/c/77567/
 * ksdevice - Anaconda internal option

Change-Id: I322c5cf8f2dc5dbae04ec1fc10688d1c9a08af70

koder-ua/nailgun-fcert,huntxu/fuel-web,prmtl/fuel-web,zhaochao/fuel-web,stackforge/fuel-web,eayunstack/fuel-web,eayunstack/fuel-web,koder-ua/nailgun-fcert,eayunstack/fuel-web,prmtl/fuel-web,nebril/fuel-web,huntxu/fuel-web,SmartInfrastructures/fuel-web-dev,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,nebril/fuel-web,huntxu/fuel-web,koder-ua/nailgun-fcert,nebril/fuel-web,eayunstack/fuel-web,zhaochao/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,zhaochao/fuel-web,nebril/fuel-web,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,zhaochao/fuel-web,SmartInfrastructures/fuel-web-dev,zhaochao/fuel-web,nebril/fuel-web,prmtl/fuel-web,stackforge/fuel-web,huntxu/fuel-web,koder-ua/nailgun-fcert