New plugin customization callbacks

spads.pl: 0.11.14a
  . new plugin customization callbacks
    "addStartScriptTags,changeUserAccessLevel,forceCpuSpeedValue"
  . fix cpu not shown in !hostStats output

SpadsPluginApi.pm: 0.9
  . new plugin customization callbacks
    "addStartScriptTags,changeUserAccessLevel,forceCpuSpeedValue"