resolve warnings while compiling coreX11
Merge branch 'master' of https://github.com/kivy/kivy
Add an option to ScrollView to control what side of the view each of its scrollbars should be on.
Better docstrings
Fixed bar-sides and some whitespace
alias `bar_side` to (`bar_side_x`, `bar_side_y`)
Change bar_side to ReferenceListProperty

Merge https://github.com/kivy/kivy

Conflicts:
	kivy/uix/scrollview.py
Merge https://github.com/kivy/kivy

Conflicts:
	kivy/data/style.kv
Merge github.com:LogicalDash/kivy
bar_side -> bar_pos
Different way of detecting scroll type, to fit with the new way of specifying it
core: improve reloading of images on context reload.
doc: add observer callbacks to context,py
core:Window improve screenshot method, closes #1455
uix: remove experimental warnings from widgets that have been present
for a while
examples:Showcase, make sure it works without any issues on android
examples:Showcase fix higherchy navigation.
Merge pull request #1714 from kivy/showcase

examples:Showcase, make sure it works without any issues on android
uix:TextInput fix selection offset closes #1717
uix:TextInput fix selection offset. From the right end this time.