Enable node-inspector listening on https.

If both an ssl-key and ssl-cert are specified on the command line
or in the config, the server will start up listening on https
on the specified port.
Create config from constructor

Temporary disable help screen for `node-inspector` command
Deprecate allowed web-host `null` value

(Use `0.0.0.0` instead)
Use yargs as argv preprocessor in config.js
Exclude configuration logic from node-debug

All configuration logic now stored in lib/config.js
Temporary disable help and version options handling in node-debug
Added `script` option to configuration
Added customizable webHost to node-debug

Switch from `localhost` to `127.0.0.1` notation
Closes #367
New help system
Added usage examples