New "quickListSelector" option

New option to allow user to insert the quick list in an existing DOM element. The element MUST exist and the selector (the option's value) MUST return only one element (just as the existing input field selector option).

Initial commit message:
- the new « quickListSelector » option (null by default) allows user to insert quick list items in an existing DOM element
- update of the README to add the new option « how-to »
- new « filterable-quick-dom-insert.html » example

Notes:
- I added "modified" to the version number in the js files just for info
- I made the minified version with an online minifier (which may not be the best practice ...)