ShowCommand - Ensure default layout fits within screen. Add verbose mode.
ConfigRepository - Move file I/O and metadata out of Application and Config*Command to a new class
ConfigRepository, FileRepository - Set file-mode in similar fashion for each (0600)
ConfigCommand - Add barebones command for interactive configuration
ConfigCommand - Prompt for "httpd_type"
ConfigCommand - Suggest paths for httpd.conf. Tweak layout.
TestCommand - Cleanup
TestCommand - Tweak layout. Strengthen test by checking for particular response code.
VhostTemplate - Add nginx template. Add more comments.