Setting language in neon config doesn't work

[pdrhlik]

Setting invoice language in neon config as specified in the docs doesn't work. It always uses the default english language.

invoice:
	lang: cs

I had to manually supply a cs argument to the Translator class like this for it to work:

new Invoice($company, new DefaultTemplate(new Translator("cs"), new Formatter("cs")));

Thanks for looking into that and of course thanks for the package!

[MartkCz]

I tried dev-master and everything is alright