Handle the escaping of 0xFF Fixes FubarDevelopment#33

Explicitly add Options services Fixes FubarDevelopment#29

Merge remote-tracking branch 'origin/master' 

Fix response to show that the client uses extended passive mode. Fixes … …FubarDevelopment#3.

Merge pull request FubarDevelopment#5 from mutac/master Return code conformity & TYPE parameter parsing