configure ram/swap size using bash syntax.
change default swap size from 0 to 1024.
use more readable code.
enable to configure ram/swap with shell variable.
enable to configure ostemplate with shell variable.
organize parameters.
remove unnecessary comment.
enable to configure nameserver/hostname/diskspace with shell variable.
organize layout.
Merge pull request #46 from wakameci/configurable-vzhost-params

Configurable vzhost params