Custom Config Object Copy

[arcanus55]

The custom config object should allow for a subset of the library config object. The transfer from custom should be on a per properties basis. Currently all properties must exist in the custom object, however it should work if only one exists.

[neodigm]

The current solutions works so this is really just a "nice to have".

[neodigm]

This is fixed in v1.8.0.

Usage:
Create a custom config snippet before loading the N55 JS.
<script> let neodigmOptCustom = {} neodigmOptCustom.neodigmWired4Sound_EVENTS = false; </script>
Opening a Soda Pop should make no sound, however executing a neodigmWired4Sound.play( x ), should make a sound.
This is done to give implementers the ability to stop ambient sounds without disabling all audio.