Simplify __main__ logic

runner.py seemed to exist for the sole function of containing
a simple function that was called by __main__.py.

I've simply removed that file with its function moved into
__main__.py itself; no functionality should be expected to change.
Make main even simpler
Make main as simple as possible!
rabble rabble rabble
Merge pull request #1536 from Ivoz/cleanup_main

Simplify __main__ logic