* Add new template of CentOS-6.4 for virtualbox
* Add ks.cfg from veewee templates
   * custizing for vagrant
* Add configuration of builder for CentOS
   * output multiple files
* Add configuration 'post_processors' for CentOS
   * output .box
* Add 'provisioners' configuration for connecting ssh to virtualbox server
   * Add shell scripts and call in provisioners
* Add new provisioners 'setup_sudo'
   * because I had error that related 'sudo' in vagrant
* Revert ks.cfg because of overlapping virtualbox.json to setup_sudo
* Add base.sh on provisioners
* Add provisioners 'vb.sh'
   * for Installing the virtualbox guest additions
* Modify base.sh because kernel-devel version is different from own 'uname -r'
   * Add '--releasever=6.4' and currect version of kernel-devel install in virtualbox
* I forget some provisioners
   * add setup_ssh.sh and vb.sh
* remove comment out
   * it is unnecessary description