register KrollWrapper as event listener; helper method to convert KrollCallback to KrollWrapper
move view template validation to TiViewTemplate class; convert ListView templates to TiViewTemplate
fix memory leaks with custom templates; remember ListItemProxies on ListViewProxy to prevent gc
[TIMOB-13013] iOS: ListView - Add support for events from cell controls
corrections for header/footer titles
support height property on template
allow delete/replace items have count larger than items size
fix compile in production mode
fix appendSection/setSections edge-case issues
layout cell children for custom templates
implement ListItem.selectionStyle
check respondsToSelector for optional TiProxyDelegate methods
implement ListItem.backgroundColor
fix issue with views being unregistered before they added to parent
support selectionStyle on custom templates
Merge pull request #3961 from mstepanov/timob-13013

[TIMOB-13013] iOS: ListView - Add support for events from cell controls