[0.0.5] added vagrant post-processor to packer templates
added additional Debian Wheezy 7.1.0 x86_64 (VirtualBox Guest Additions 4.2.16, Chef 11.6.0, Puppet 3.2.3)
integrated needed kernel params for docker.io
fixed packer attributes (iso_md5 -> iso_checksum & iso_chechsum_type)
[GH-#2] packer fails to install VirtualBox Guest Additions (missing XFree86 Window System); fixes #2