Read Python stdout but no insert

[Landixus]

If you have a "looping" python script you need to start with:

var pyshell = new PythonShell('test.py',{scriptPath:"./", pythonOptions: ['-u']});

should be in readme?

[Almenon]

-u is already in the readme but it could use an explanation.

Getting print results in real-time seems to be a common issue: see #78, #103

Edit: #81 too