Refactored oo-install around host instances
Updated template configs to match new layout
Refactored launchers to match new config file
Ignore nil ip addr for non-broker, non-node hosts
Merge pull request #138 from nhr/host_instance_refactor

Host instance refactor
Moved highline menu elements inside choose block
Merge pull request #139 from nhr/highline_menu_fix

Moved highline menu elements inside choose block
Resolve IP addr settings straight away
Merge pull request #141 from nhr/ip_discovery

Resolve IP addr settings straight away
Replaced launcher role mappings that were lost in refactor
Merge pull request #142 from nhr/workflow_roles_fix

Replaced launcher role mappings that were lost in refactor
OO_INSTALL_KEEP_ASSETS now preserves Origin puppet file
Merge pull request #143 from nhr/preserve_pp_file

OO_INSTALL_KEEP_ASSETS now preserves Origin puppet file