Change image pygmae to use file handles instead of path because of unicode issues.
Change texture cache key to keep str type of the filename so we don't get encoding issues in automatic encoding.
Merge branch 'master' of https://github.com/kivy/kivy into image-unicode
Don't save open file.
Ensure filename is not auto converted bytes/unicode anywhere.
Fix unicode issues where python internally converts unicode to bytes.
Implement Window maximize, minimize and restore
Implement Window hide and show
Move _is_desktop attribute to WindowBase
docstring revision
Remove empty line
Fix typo in graphics guide docs
fix ListItem* repr for python 2
Merge pull request #2599 from LauritzThaulow/master

Fix typo in graphics guide docs
anchorlayout doc revision
init doc revision
progressbar doc revision
scatterlayout doc revision
layout doc revision
floatlayout doc revision