uix:GridLayout honour width/height for the col/row only if all the
widgets are setting size_hint_x/y to None. closes #954
Fixed example code for populating a tree view, replacing it with code for a minimal working example.
Changed the example app to fit preferred approach in new programming guides.
Removed inmports and main view bits, to reduce to minimum example.
Merge pull request #963 from geojeff/treeview_docs

Fixed example code for populating a tree view, replacing it with code fo...
textinput: ensure others dependent values from self._lines are updated before assigning a new self._lines. Otherwise, the text property is triggered, and bad magic will happen. closes #950
Merge branch 'master' of ssh://github.com/kivy/kivy
doc: extend size/pos_hint explanation in widget.rst in guide2
Add placeholder StringProperty to TextInput widget.
Merge branch 'master' into placeholder
Merge pull request #956 from kivy/gridlayout

uix:GridLayout honour width/height for the col/row only if all the
asyncimage: fix asyncimage widget with http resources + re-host the image on kivy.org
context: fix reloading of images from the network. Currently, the reloading happen on the Texture itself by using the Loader.image, but we lost the reloading gif. I guess we should handle the reloading in the AsyncImage maybe. closes #895
Add basic placeholder functionality.
Add placeholder_color ListProperty.
Refresh placeholder text on widget size change.
Edit TextInput style to respect placeholder_color.

Use a lighter grey for default placeholder_color.
Make placeholder text respect font_name and font_size.
Rename 'placeholder' -> 'hint_text'.
Show hint_text when password=True.