BufferStream/StringStream fromFile / toFile methods.

[MichalCz]

Is your feature request related to a problem? Please describe.

Every time we need to parse a file there's a lot of code needed.

Describe the solution you'd like

This should work:

StringStream.fromFile('./path/to/file', {encoding: 'utf-8'})
    .lines()
    .reduce((sum, x) => sum + (x ? 1 : 0))

[MichalCz]

Ok, slight mod... should be fromUri?