GUI adjustments

. changed var names field to qlistwidget
. all signals and slots moved to gui.py
. renamed some objects (needs more refactoring)
bug fixes, refactoring, added signals, unicode workaround

. fixed skip_dss
. some refactoring
. moved signals and slots from ui file
. added buttons dialogs
. added workarounds for unidecode/string issues
. functions to convert between QListWidget and python list