Symfony Console achievements

We fixed some bugs in the Symfony Console component including:

• STTY not reset when aborting in QuestionHelper::autocomplete()
• Inconsistent result for choice questions in non-interactive mode
• Broken formatting of Table that has a trailing backslash
• Inability to run most tests independently from each other

We also started to think about how we could refactor the current word-wrapping algorithm which has some known design issues. The fact that the core team members and contributors met helped a lot to move forward.