Support streams

[baterflyrity]

Hi! Can someone add support for raw binary streams instead of reading/writting physical files?

I have a starting point here: simply add availability of passing stream as file parameter alongside with manually opening it every time.

[remram44]

Would wrapping the calls to open() in a member method help? That way you can override it in a subclass?

[baterflyrity]

@remram44 , can you explain more detailed what do you mean under wrapping?

[remram44]

Duplicate of #94