Add a possibility to send several variables

[MoonlightOwl]

This will make Zn lib more flexible.

[Fingercomp]

Personally I'd keep only one chunk available, but with unlimited length, so the data has to be split in parts and then "glued" up together if it's too large to be sent in a single message.

[MoonlightOwl]

Okay, let's see, how it will show itself.