doc: update description for Ubuntu known issues

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
template: appears sata/scsi only when nesseary

- sata disk controller does not support suspend.
  It is appears only when it is neccesary.

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
split document and add more requirement

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
readme: add comparison with vagrant-libvirt

work for #159

Signed-off-by: Hiroshi Miura <miurahr@linux.com>
Merge pull request #164 from miurahr/doc_add_nessesary_packages

split document and add more requirement
Merge pull request #157 from miurahr/fix_suspend_fail

template: appears sata/scsi only when nesseary
doc: update build depenency

- add development libaries
  these libraries are bundled with vagrant distribution.
  it is nessesary for development.

Signed-off-by: Hiroshi Miura <miurahr@linux.com>