Starting improvements for ESXi 5 builds
Minor fix to gpxe template for esxi 5

Just added the $http_port to the urls so it works on cobbler
systems that have modified that setting.
Added an ESXi 5 kickstart, based on a VMware KB
Minor template text change
Forgot to add the kernelopts line to the esxi5 bootcfg template
Merge pull request #448 from jimi1283/esxi_improvements

Esxi improvements