reorganize files and bring code inline with current master

Conflicts:
	lib/simple_config.py

gui/kivy/uix/combobox.py

@@ -0,0 +1,93 @@
+'''
+ComboBox
+=======
+
+Based on Spinner
+'''
+
+__all__ = ('ComboBox', 'ComboBoxOption')
+
+from kivy.properties import ListProperty, ObjectProperty, BooleanProperty
+from kivy.uix.button import Button
+from kivy.uix.dropdown import DropDown
+from kivy.lang import Builder
+
+
+Builder.load_string('''
+<ComboBoxOption>:
+    size_hint_y: None
+    height: 44
+
+<ComboBox>:
+    background_normal: 'atlas://data/images/defaulttheme/spinner'
+    background_down: 'atlas://data/images/defaulttheme/spinner_pressed'
+    on_key:
+        if self.items: x, y = zip(*self.items); self.text = y[x.index(args[1])]
+''')
+
+
+class ComboBoxOption(Button):
+    pass
+
+
+class ComboBox(Button):
+    items = ListProperty()
+    key = ObjectProperty()
+
+    option_cls = ObjectProperty(ComboBoxOption)
+
+    dropdown_cls = ObjectProperty(DropDown)
+
+    is_open = BooleanProperty(False)
+
+    def __init__(self, **kwargs):
+        self._dropdown = None
+        super(ComboBox, self).__init__(**kwargs)
+        self.items_dict = dict(self.items)
+        self.bind(
+            on_release=self._toggle_dropdown,
+            dropdown_cls=self._build_dropdown,
+            option_cls=self._build_dropdown,
+            items=self._update_dropdown,
+            key=self._update_text)
+        self._build_dropdown()
+        self._update_text()
+
+    def _update_text(self, *largs):
+        try:
+            self.text = self.items_dict[self.key]
+        except KeyError:
+            pass
+
+    def _build_dropdown(self, *largs):
+        if self._dropdown:
+            self._dropdown.unbind(on_select=self._on_dropdown_select)
+            self._dropdown.dismiss()
+            self._dropdown = None
+        self._dropdown = self.dropdown_cls()
+        self._dropdown.bind(on_select=self._on_dropdown_select)
+        self._update_dropdown()
+
+    def _update_dropdown(self, *largs):
+        dp = self._dropdown
+        cls = self.option_cls
+        dp.clear_widgets()
+        for key, value in self.items:
+            item = cls(text=value)
+            # extra attribute
+            item.key = key
+            item.bind(on_release=lambda option: dp.select(option.key))
+            dp.add_widget(item)
+
+    def _toggle_dropdown(self, *largs):
+        self.is_open = not self.is_open
+
+    def _on_dropdown_select(self, instance, data, *largs):
+        self.key = data
+        self.is_open = False
+
+    def on_is_open(self, instance, value):
+        if value:
+            self._dropdown.open(self)
+        else:
+            self._dropdown.dismiss()