ZioGuiHandler.py: improve code readability (80 column lines)
zgui.py: allow execution

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
zGui: move acquisition to QThread environment

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>
ZioGuiHandler.py:[FIX]: restore chart color

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>