* wip(frontend): ISO file is no longer mandatory

issue #918

* Added templete for empty 32bit machine

issue #918

*     Added template for empty 64bit machine

    issue #918

* Modify empty i386 vm
Added empty x64 vm in definition list

issue #918

* Fixed white spaces

* Fixed white spaces

* Change comments format to standarize formats
Now, descriptions are like "Machine 32 bits" w

issue #918