Add tabular VIM plugin.

Setup puppet files to delimitMate configuration. Moved the remap
of the , character from the main .vimrc file to only the required
file type plugin configuration files.
Update install script and SSH configuration.

Install script will now setup the SSH jump box and
enable SSH ControlPersist option only if it is supported.
Update installer.

VIM now uses the tabular plugin. SSH jump box and ControlPersist
are now setup automatically.