gitignore: Ignore vim swap files

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
Import GPIO module dependency

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
Add basic server code

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>