Reorganize bootstrap scripts

 * Split up the 'local' scripts that actually install chef and do the inital
   run from the 'remote' scripts that drop the files in place via ssh or
   zlogin.
 * Allow the config.sh file to be in a different directory from the bootstrap
   scripts. This allows you to keep a separate repository for bootstrap
   configurations. The chef key and any schlep files need to be in the same
   directory as the config.sh.
 * Remove obsolete bootstrap-gblz-omnios and bootstrap-globalzone scripts.