Doc fix to clarify kv property behaviour (fixes #2374)
Merge pull request #2751 from helenst/kv-property-doc-fix

Doc fix to clarify kv property behaviour (fixes #2374)
Fixes wrong system font directory path on iOS
Merge pull request #2754 from derekstavis/patch-4

Fixes typo in system font directory path on iOS
Update vertex_instructions_line.pxi
fix clipboard_pygame.py to encode only for py2
Style Guide Fixes:Pep8
Update clipboard_pygame.py
Merge pull request #2760 from kivy/styleguide_fixes

Style Guide/Pep8 fixes
Merge branch 'master' into fix_2750

Conflicts:
	kivy/uix/stacklayout.py

Merging with master (resolving conflict in stacklayout.py).
Keeping my version.