Added option to customize placeholder

[piotr-cz]

By default placeholder is set and localized by Google Maps, but there is an option to customize it.

See Docs > Customize the placeholder text for Autocomplete

usage:

new L.Control.GPlaceAutocomplete({
    placeholder: 'Zadejte místo které chcete vyhledat'
}).addTo(map)

[Twista]

Nice, thanks for the PR.

I will merge it (and re-release) soon

[Twista]

Hey @piotr-cz

I'm very sorry for the delay, the new version (v.0.0.9) was just published.

Thank you very much for your contribution

Cheers