Update README to use ~ for the home directory

Using ~ to specify the home directory should allow anyone to copy/paste the example. Also, this makes all the references the same. 
Previously there was a /home/sven and a /Users/sven.
Revert changes to "config" parameters

Per comment on the pull request, I've reverted the changes to the example parameters. I still believe the create config section should be changed as anyone can then copy/paste the command to create their config file without having to edit the command.
Merge pull request #312 from jgeiger/patch-2

Update README to use ~ for the home directory