Initial fixes for pep8 violations in proton.py
pep8 fixes for connection.py in proton wrapper
pep8 fixes for container.py in proton wrapper
pep8 fixes for link.py in proton wrapper
pep8 fixes for sockets.py in proton wrapper
minor whitespace adjustment to license header
merge in Gordon's latest work
fix sender/receiver link reference
Whitespace fix: two blanks lines before new class def