better and make more similar to Python3
load.py: handle magic errors better
main.py: correct use when passing a .py instead of a .pyc better and a message
err when file not found.
pysource.py: fix up main docstring; code moved from main.py
exception errrors such as when a pyc file is not found
uncompyle6: Hook in --grammar option to showing grammar.
rules. Default now does not show timestamp.