Initial commit for the more modular rewrite of the Photobooth.

Basic Qt5-GUI implemented
Config-File support implemented
Basic settings dialog to change config implemented
NO Photobooth functionality, yet

photobooth/defaults.cfg

@@ -0,0 +1,21 @@
+[Gui]
+# Start Photobooth in fullscreen mode (True/False)
+fullscreen = False
+# Width of Photobooth (if not fullscreen)
+width = 1024
+# Height of Photobooth (if not fullscreen)
+height = 600
+
+[Camera]
+# Wrapper to use gPhoto2 (gphoto2-cffi, piggyphoto, commandline)
+gphoto2_wrapper = commandline
+
+[Gpio]
+# Enable use of GPIO (True/False)
+enable = True
+# Pin 18 (Channel 24) lets you return to start screen
+exit_channel = 24
+# Pin 16 (Channel 23) triggers capturing pictures
+trigger_channel = 23
+# Pin 7 (Channel 4) switches the lamp on and off
+lamp_channel = 4