[tasks_redux] starting reworking of tasks

* Added specific autoloader to workaround GLPI's one
* Separation of view and model methods of Task
* Removed Task Summary frontend (this will be handled in Task view with
  a dashboard() method.
fix task rights
move some agents related method in the Agent class
fix new missing network timeout code
adapt Agent's view methods to 0.85
disable some addOrderBy hook on Task list
fix some profile display bug

* DeployState is not used anymore but it's left for reference (tasks
 redux work in progress)
* Adapt the PluginFusioninventoryInventoryComputerImportXML right to the
 new 0.85 profile management