Add post_mkcamp_command hook

Add ability for a command to be run after mkcamp completes.
Adjust mkcamp to allow for the app init to only happen if you
have a app defined.
Added camp_config() hash key '0number' which contains the camp number 0-padded, so camp numbers less than 10 will have a leading 0 (like 07).
Merge remote-tracking branch 'localfilmmaker/tokens'