sample.lua doesn't support bytes output

[ChristianRomberg]

Hi,
first of all, thank you for this great project. It gives me as someone who hasn't studied machine learning the option to do some pretty nice text generation.
I trained the network on some binary data. It seems to work pretty well, or at least the loss is decreasing. Now, when I try to run sample.lua, it will give me the ordinal numbers with square brackets around it (like stored in the json file) instead of its binary counterparts.
I'm going to try to fix it myself, but I'm not a lua expert at all so I might need some help.

Also, as a feature request: What do you think about adding infinite sampling output?