Sharing files

[glodanif]

Add an ability to send any kind of files.
Increase/make changeable/disable file size sharing limit.

[jeremy635]

Hey

[glodanif]

@jeremy635 what's up?

[teezzan]

Interesting feature. How is it coming? I'd like to be able to send audio too.

[glodanif]

@teezzan I don't have much time for this project right now, it shouldn't be that difficult to implement but I don't know when I can start.