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.
(style) You can use an underscore here.
```
find(_.getKey == config.param) ....
```
I find that a little more readable at times since there is one less token to parse.