The information in the usage string for the `help` command about
how to get more information about a specific command was incorrect:
"influxd help [command]" does not work, but "influxd [command] --help"
does.
Updating the help formatting for all of the commands for consistency.
Removed tabs from the output in favor of using spaces so it is more
clear how the output is intended to look.
Mark Rushakoff
Matthias Nüßler
Jonathan A. Sternberg
Ben Johnson