correct LICENSE: Foobar => jb-soundboard

Signed-off-by: Mattias Andrée <maandree@operamail.com>
fix shebang: python => python2    (otherwise e.g. Arch will use Python 3)

Signed-off-by: Mattias Andrée <maandree@operamail.com>
python-xlib => python2-xlib

Signed-off-by: Mattias Andrée <maandree@operamail.com>
python2-imaging is required by pyxhook.py

Signed-off-by: Mattias Andrée <maandree@operamail.com>
improve .gitignore

Signed-off-by: Mattias Andrée <maandree@operamail.com>