[TIMOB-14543] Initial implementation for SIZE support in listView
[TIMOB-14543] Code refactor for contet height calculation
[TIMOB-14543] Signal content change to proxy
[TIMOB-14543] Bug Fix + more signalling for proxy
Merge branch 'master' of github.com:appcelerator/titanium_mobile into timob-14543

Conflicts:
	iphone/Classes/TiUIListView.m
Merge pull request #5947 from vishalduggal/timob-14543

[TIMOB-14543] iOS: Ti.UI.SIZE support for ListView height