GEOMESA-258 Confirm Bloom-filter setting on new tables from command line tools

Added a new `tableconf` command, with `list`, `describe`, and `update` for
configuring a table from the command line. Updated README and also refactored
the help for the command line tools a bit.
If "help" is found anywhere in the args, it's already caught by the if statement before this large else { } block.