Manager fixes
Manager fixes

Use socket.makefile for the socket, it's so much easier.
Don't put a file object in the queue when receiving, just the list of
lines read.
Fix parsing of message in ManagerMsg:
- don't ignore blank lines
- put everything after an invalid header into data
In _receive_data:
- read whole lines -- socket.makefile makes it possible
- if an invalid header is encountered read until END COMMAND marker
- put list of lines into the queue, not an artificial file object

medularis/py-star