core:Window improve screenshot method, closes #1455
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.
uix:CodeInput. Use mono-space font by default
Merge pull request #1711 from kivy/screenshot

core:Window improve screenshot method, closes #1455
sanitize ids example.
Update lang.rst
Merge branch 'master' of https://github.com/kivy/kivy into kv_include

merge master before pull request