Merge pull request #347 from saramgsilva/master

Update Helper
Fix for the iOS sample project
Update to Xamarin Forms pre-4
Add branch info
New build for 1.2
Merge branch 'master' of https://github.com/XForms/Xamarin-Forms-Labs
Added ButtonGroup control and sample page
Web hybrid fixes

https://github.com/XForms/Xamarin-Forms-Labs/issues/353#issuecomment-574
63758
Merge pull request #28 from XForms/master

Merge from main
Added DataSource setting to the item in list when controls are first bound.
Merge pull request #356 from Bowman74/master

Fixed bug in RepeaterView where child controls wouldn't have DataSource set.